Not accepting someone as they are
Why are people so hung up on fixing each other?
I have a novel idea: Find someone who is good enough right now. Too many people fall for partners who are broken in some way, and become obsessed with making them whole again. We put ourselves into a romantic movie of our own and then get pissed when the ending isn't what we expected.
In case you hadn't already heard, people can't be fixed by other people. That stuff comes from within. We are who we are, we rarely change, and chances are, that damaged person you fell for is just fine for someone else.
Making people into projects leaves them resentful for not being accepted "as is." And really, that's not bad logic.