The painful growth stage of change. You have to be some special kind of asshole to say there is no way in which you could improve yourself. But it's one things to admit your faults or that you have them. When you are actively trying to confront and change those things it's full of uncomfortable realizations about behavior that you did not even know was a problem.
Also around 90 days into early sobriety, it's pretty common to just randomly want to drink for no particular reason.