It's the people we resist most that are our real teachers. They teach us all about our relationship w/ ourselves.
I've noticed that the things we most resist about others, the things we judge and resent them for, are most often the very same things we've judged as unacceptable about ourselves and denied.
For instance, let's say I'm thinking, “She/he is so judgmental.” When I turn that sentence around, putting my name in place of theirs, the truth is clearly revealed; “I am so judgmental.” Yeah, like, for instance, I'm being judgmental of them right now, for being so judgmental!
We project our negative qualities onto others and then judge them for what we cannot see or accept about ourselves.