...Larian falls into a typical GM trap: they mistake difficulty without reward with challenge. If a game becomes too difficult without reward, it is just frustrating. And yes, when its too easy, it could become boring...
I've played about 40 hours of BG3 EA so far and while it I have a lot of critique points for improvement, I've also enjoyed it immensely for the most part. I don't really agree much with any of your listed issues as I think of lot them are simply because you haven't played the game enough to discover it's (very well hidden) intricacies and features but this quote I very much agree with.