Be who you are & improve what you don't like. Have realistic expectations & then do what you need to do in order to be the sort of person you can respect.

The whole self acceptance thing is an important first step, because you can't improve if you don't know where you are & what needs to improve.

But a lot of people seem to screw it up by trying to pretend their flaws are something to celebrate. Identifying with your flaws is arguably worse than being blind to them.