That's what I'm getting at. In my own experience, unhandled grudges against people end up being a major source of stress. Some people (my past self included) do

That's what I'm getting at. In my own experience, unhandled grudges against people end up being a major source of stress. Some people (my past self included) don't know how to stand up for themselves at a company. It's a combination of knowing what lines people can't cross with you, and what sorts of authority different people at work can have over you, because when someone crosses a line, how you correct them will differ according to their relation to you. For example, if a manager is rude to you, you can often excuse yourself but can't completely drop the issue, whereas, if a fellow collaborator is rude, sometimes you can just stop dealing with them altogether. Sometimes just looking perturbed without saying anything is enough to make people change how they deal with you. A lot of developers I see don't pay any attention to these things and nurse grudges against people for entire years.