During the majority of my career, I've been the stereotypical pissed off guy with earphones in mashing away at his keyboard.

During lunch hours, I absolutely love listening to other pissed off devs. Their tales of buggy Microsoft products, oblivious project managers, dangerously unqualified directors, and severely disabled bosses are often the only thing that put a smile on my face in a workday, and here in Tokyo a workday is often your whole day. I don't feel there's anything wrong with it - the targets of their abuse often really are leeching tons of money while contributing little to nothing, so I feel like they deserve the abuse.

However, I don't like it when devs trash-talk other devs. I sympathize with those guys, even if they wrote bad code. I know writing good code is really, really hard, and I know that they were trying to do it under extremely difficult circumstances (in an office). If they're junior I sympathize even more because they're often better than I was when I had the same amount of experience.

So in conclusion, don't hate your fellow dev. Don't let hatred control you and poison your well-being. Direct your hatred where it belongs, at project managers.