Bottom line: I'm incompetent at my job.
I don't know why I'm so bad. I don't think I'm stupid, or at least didn't used to be, but my performance suggests otherwise and I'm not adding anything to the team.
The right thing to do would be to hand in my notice and find something else, but my confidence is at rock bottom, I'm only just keeping things afloat and I need the money.
AIBU to stay when I wouldn't want to have to work with me?
(NB No lives are at risk)