It's more likely that successful creators feel exactly the same way you do about their outputs but have some process to either periodically re-evaluate projects vis a vis tastes or the ability to swallow their pride and put out something that's probably good enough. Otherwise they'd never get to the next thing(s) they're excited about.

It's a common sight to see creators malign their own amazing and successful projects as simplistic or off-base: the "if I only had more time..." phenomenon.