"if you can't handle me at my worst you don't deserve me at my best".
You're basically excusing bad behavior. And never taking accountability. People are wrong. Mostly when they are so blindly following some perception of greatness rather than caring for those around you.
Anyone who feels the need to say this is usually really, really bad at their worst, and just okay-ish at their best. They just need a reason why it's everyone else's fault nobody can put up with them.