Psychopaths aren't always violent. The ones who get caught and diagnosed are by definition the bottom of the class. There's an entire business class of our society that lauds and richly rewards the traits of a psychopath. That's what Jimmy is getting into. I mean, he gave his speech to the little girl to forgive himself for what he's about to do. "No one's going to give me a chance, they're all against me, I have no choice but to go against the rules, boo hoo hoo..." That's all that was.
Jimmy broke down because of what was done to him. His needs. His career. His future.
It's funny, looking back at this thread how so many people considered Chuck the bad guy for blocking Jimmy to get hired by HHM, but what did Jimmy do to f*** over Chuck? He lied, fabricated evidence, tried to coerce a witness to it, continued to gaslight Chuck all to call his judgement into question for a fraud Jimmy committed as an officer of the court. And then Chuck killed himself. For which Jimmy clearly feels nothing.