Sorry but your CTDs arent mod problems(not really).There are plenty of reasons for the CTDs you might have but they are definitely not mod bugs.
I played this mod for months now and i never had a CTD.
The mod isnt garbage just because you are getting your ass kicked.
You complain about difficulty yet you are playing a single city faction (which i think is one of the hardest campaigns).
Diplomacy is broken in every mod so you cant expect alliances to mean anything.
Rome attacking you with 3 stacks shouldnt be that surprising.This is 216 BC...they managed to recruit 16 legions just to defeat a single general.