To be perfectly frank, I think Cyclops' ironic point flew well over your head like a stone at the stoning of the adultress.
Speaking of the latter, here's a joke for your enjoyment
Right, back on topic. There is a lot I wanted to respond to. In the past few posts we've had
1) moral relativism vs absolutism
2) heroes/villains from literature/narrations vs heroic/villainous behaviour in real life
3) communication as a means to arrive at common understandings/morals/truths
There were other things as well I found highly interesting, but about which I have nothing to say that would elucidate anything any further, so I'm gonna stick with those three. I'll try to deal with 1+3 together and get back to 2 later.
BPG advanced a position of stark moral absolutism which immediately showed its weakness, though:
Either you have to dictate a moral code to others and then probably cannot rely on their adherence to it unless you enforce it by threat of violence. This is something most of us would instinctively call immoral, but that is not an argument. For the time being, an authoritarian system with a externally imposed moral code for everyone may even be intrinsically consistent. I will have to come back to this later to argue why it is not. Mark this by (+).
Or you have to make inane claims about supposedly self-evident objective truths as the basis of common morals. But truth as a static, self-evident equivalence of an independently existing object and its perception by an observer has long been debunked, most famously by Kant, but already a couple years earlier by Descartes (his "cogito" is badly translated as "I think", more fittingly it should be "I doubt"). We've had plenty of discussion about this in the EMM and anyone interested in this issue itself can read them here, or just go and read Kant and Descartes, so I'm not going to elaborate on this any further (unless asked to).
The point is, human perception and thinking (the first, second, third order processing of perceptions according to the rules we call "logics"), are highly fallible, which gets us to the question of moral relativism: Usually this is worded in the way of "one man's hero/freedom fighter, another one's villain/terrorist" and suggests that morals are entirely arbitrary and subjective. I posit two things: One, that the relativism goes even deeper, and two, that this - surprisingly - makes the morals actually less arbitrary.
For the first point, go back to Kant and Descartes: Not only are the moral rules according to which we (wish to) act subjective and fallible, but even the "facts" (circumstances, actions of others, ...) to which we react according to such rules are only the outcome of highly fallible subjective perception and reasoning. We're not just applying different rules to the same facts, we're applying different rules to different perceptions. Taken at face value, this should actually result in societal breakdown and Hobbes' (not the tiger!) war of all against all. However, it doesn't, apparently, and that is because of communication:
The very fallibility of our perceptions forces us to cooperate with others and sort the reliable or "true" from the unrealiable or "false" perceptions by means of exchange of information and arguments, in order to ensure that we do not suffer harm due to misconceptions (like fire not being hot, humans being able to fly, and other stuff you may even have thought true at the age of three). Note that I put "true" and "false" in quotes, because I am not interested in supposed extrinsic truths: Even if the thing-itself exists independent of our thoughts, we can never access it (cf. Kant, again), so the only "truths" we need are reliably reproducible perceptions and reliably communicatable notions about those, something completely intrinsic to our mind.
How does that make morals less arbitrary? Well, in order to navigate your own sea of fallible perceptions and thoughts without running aground or sinking, you need to communicate with others - and in such a way that you can expect them not to willingly deceive you. In short, you need other people, not just incidentally because of the division of labour, but necessarily, on a purely epistemological level.
From that we can easily derive some sort of basic "epistemological" morals:
Treat others always in such a way that you can expect them to engage in honest communication with you to reduce the life hazard of unreliable ("false") perceptions or thoughts.
This is also, where the authoritarian system (see (+) above) with enforced moral code fails: The authoritarian power does not treat the others subject to their set moral code according to the above rule. On an abstract philosophical level a "villain" is then anyone who disregards the integral importance of other people to his/her own existence and fails to respect their dignity as equal participants of discourse.
All moral systems that go beyond that in scope or detail are again, subject to communication and exchange of opinions and arguments - which is where narratives come in. They are a means to enable communication across larger temporal or spatial distances, within or even across cultural reference groups. As such I do not find it so surprising that most "heros" or "villains" in such narratives are broken characters with both good and evil aspects on either side: They serve as anchors for questions you have to ask yourself rather than answers you are supposed to accept. It is easy to declare A as good and B as bad, but what really defines a moral system is what situations it recognises as not clearly decidable, as moral dilemmata, and what attempts at resolutions it offers. This even applies to religious narratives/texts: As a Catholic I may believe that scripture holds ultimate moral truth (among other truths), but my reading (perception!) or understanding (thought!) of it may be wrong, and I need to communicate with others identifying as Catholics (in my case) to arrive at a reliable understanding of it. This understanding is still subject to our joint fallibility (even though that is likely smaller than my individual one), so we claiming to have entirely fathomed the divine will on some issue would not only be blasphemous hubris, but also epistemological nonsense.
Lastly, since you brought up the Thanos/Tony Stark example, Cyclops, I think many "superheroes/-villains" from the comic universes do not fit the actual hero/villain motives from literature/older narratives: They are mostly described as morally unambiguous (and usually given some exemplary scene of saving a single random civilian), but ultimately (and I think this gets really clear when watching the Avenger movies and their likes) these stories do not depict moral conflicts, but merely titanic struggles of Titans A against Titans B where one group of titans is arbitrarily labelled as "ours" or "good". Superhero movies really are more akin to the stories of titan/god struggles from older mythologies than to hero/villain struggles - their prota- and antagonists aren't human, are not subject to human moral questions and ultimately do not care for humans. (There are of course, exceptions, Spiderman probably being one of the morally more interesting characters, at least in the beginning.)