Doesn't sound like just the previous relationship if you've been feeling it most of your life? I suspect your parents or teachers may have implied you weren't good enough.

When I have thoughts like that I counter them: Not good enough for what? It all boils down to what we want, it's our life. You have to be good enough for your own purposes. Sure we can probably do better and if we want to try, we can do that! I like to get things right and I take pride in doing things well so often I will do things over if I feel like I haven't done them as well as I can or want them.

But sometimes the thought doesn't fit the job. Not doing the dishes good enough because you don't finish doing them in one "session" doesn't make sense because you aren't being timed and there's no one else who cares :-)

My stepmother use to get angry because it would be my night to do the dishes (my brother and I alternated on that chore) and I'd have to go to the bathroom after dinner. She accused me of deliberately saying I had to go to the bathroom to get out of doing the dishes and she'd angrily do them all while I was in the bathroom and then yell at me for that. LOL, she couldn't have walked away for the 5-10 minutes until I got out of the bathroom to see if I'd do them then? They couldn't have waited half an hour? What was the big deal? I can see that now but back then I'd definitely feel like I'd done something wrong having to go to the bathroom, LOL.