It's probably partly because of the hype. I refused to play Cyberpunk at launch because the hype was at such stratospheric levels I felt there was actually no way it could live up to it. BG3 right now feels very similar in that regard. With the way people have been talking it up, it basically has to come out the gates flawless. The start can't be bad since we'd have known about it by now after 3 years of Early Access, but maybe the final 2/3rds or whatever isn't as ready as they should be?