So one way to reconcile the more hyperbolic and silly critiques is to understand that it's not really the game they are complaining about.
Nah, it's pretty much the game. Clunky UI is a clunky UI for example. Tactically uninteresting combat, is just that. I did find narrative to be messy, and choices the game offers narratively unappealing. I don't think you will learn much about my personality, beside I played cRPGs for over 20 years, and BG3 just didn't blow my socks off.
Elden Ring and BG3 compasison is... interesting. You suggest that there is major overlap in audience.... which you will need data support to convince me of it. I can only speak for myself - and while I enjoyed Elden Ring a lot (not as much as most of other FromSoft releases though) I didn't BG3. Which is not a judgement on either of the games - they are very, very different titles. One suits my tastes much better, that is all.