D&D has never had the best combat system in my eyes, but it is what it is. Plenty of other games have more detailed, more realistic, or more elegant combat systems, but they are not D&D. D&D obviously works as a game because it is so popular - nobody is forcing gamers to buy and play the game. I don't like the way a lot of the game works but I am apparently not the majority, and my issues with the system are tempered with a long association with the game and an acknowledgement that D&D rules just work that way. It is D&D and I accept that when I play the game.
BG3 is game that is heavily based in D&D 5e (not exactly, but that would never be the case), and the developers have stated that they would be using D&D 5e from day one. The BG franchise is immersed in a Forgotten Realms setting which has been used for AD&D and D&D since the very early days.
I don't know that, were I to so vehemently hate a set of rules, I would be willing to spend money on buying a game that so clearly uses those rules. You don't buy a cow and then complain that it is too bovine.
