After a month I can confirm that “not caring” and just being cordial and friendly with people (even if you find them annoying!) is the right move. Work is WAY less stressful after doing this consistently for a while.
Usually, your coworkers/bosses aren’t your friends, even if they can sometimes act like it. There are exceptions, obviously, but I think I get this dissonance in my head sometimes where I take someone acting in their own self interest as a personal slight.