I think it depends a lot on when you leave. If you work past the point of being done with it, you really start to hate it. And then it's very easy to blame everybody and everything else, rather than your decision to stay past the point where you loved it.

I get why people do that, though. Sometimes they love something and want to fight for it. Sometimes they have to keep working if they want their kids to keep eating. Sometimes they just don't notice that moment where they crossed the line.

So kudos to him for knowing when to quit.