> I wish I knew why my experience has been so vastly different from the people I was on a team with, but the nature of our work meant we mostly work solo or in coordination with people on other teams, rather than grouping up with each other. As a consequence I didn't really see what was causing them to be so dissatisfied.This is rank speculation on my part:
Some people are lucky (or oblivious) enough to have passive aggressive BS just roll off their back without causing stress. This isn't an adaptive trait in any context where passive aggression is a possible precursor to overt aggression, but you may also have other traits (for example physical size and gender) that make it less likely for you to experience that sort of escalation.
There are many possible variations on this (physical appearance, personality, social class, a supervisor's biases), but you'd have to share a lot more about yourself to narrow it down. Suffice it to say that you may just not be treated the same as your colleagues, or you may not experience similar treatment in similar ways.