I would have expected him to be way more pissed given the way they they portrayed him in the rest of the film. At the start of the movie he's throwing wrenches at people, they don't really show any character development that would suggest he wouldn't be pissed, and then it's just "oh well: I went against my better judgment and got fucked over by my own team. I guess I'll let that slide."

I get that's generally the way it happened, but you still have to make the characters act/react consistent with how you portrayed them.