You dont know what you are talking about. He cared about the clones, and his men. Most jedi didnt saw the clones as expendable at all, but actualy men. And the clones in 501st revered Anakin, because he led by example, and was "stuck in the mud" with them, in most times.
And there were several instances when Anakin was ruthless and pragmatic to acomplish his military objectives, or in interrogations, he crossed the line for sure.
Also you are falling for the myth that the war was only between droids and a clones. Well i agree that lucas failed concept wise, to give emotional relevance to the war in the movies.
However Star wars the clone wars TV show, all they did was give that emotional interest back to the war. It wasnt just about mindless droids and expendable clones. The clones were living breathing, had names, had humanity in them, and were actual characters in the show for good and for the bad. They could be corrupted by money or power, they could fall to desertion, and some end up chosing their own way out of the war, and others chose to folow trough and made their mission to fight in the war. Hell there are Episodes that deal with exactly those issues soley. hell the first episode of the series highlight exactly that with that Yoda and clones episode if im not mistaken.
Also The TV show showed that the seperatists didnt always deployed droids in their battles. After all The Seperatists were made by Former republic planets, with armies of their own. They showcased a Seperatist senate with good people that thought were doing the right thing, because they sought the republic as corrupt. ( it wasnt a black and white matter, at least in the animated Tv show it wasnt). Only as you know the sith manipulated both sides.
But at anycase In the second battle of geonosis, the clones fought Geonosians, in the battle of Umbara the clones fought Umbarans, there were episodes with the Zygerrian empire, they are slavers that had an aliance with Dooku, the war wasnt just about mindless expendable drones at all. there was the Onderon conflict, the mandalorian conflicts as well where you had defined characters, and players with their own reasons, the defense of kamino, where there is an emotional link with clones there where they felt the need to defend their home, and their brothers etc.
The point im trying to make it is the Show built characters and stories for them, and put them in the scenario of conflict and sometimes of hard choices. that is what makes it engaging imo. The oposite of the prequels, where you realy didnt cared about the characters that much, where the grand view was oulined instead.
Awesome battle of Umbara btw
Awesome second battle of geonosis And its aftermath with Anakin crossing a line in an interrogation, where he needed information to save his padawan and the lives in a republic transport that had been overtaken by geonosis larvas.
Another dark side, Anakin moment...