Now take all this and slap some basic 5e mechanics to it and you have BG3 EA prior to patch 1. 7 patches later, it's looking less like this and more 5e, but it's certainly still got a TON of the above and plenty of missing 5e mechanics.
But, come on. You try taking an engine and reworking the whole thing to accommodate an entirely new rule system. That can't be easy.
My point? It REALLY seems clear to me that it has nothing to do with whether they like 5e or not, and whether it's impossible to translate tabletop to a video game. I think it all boils down to it was just plain easier and more cost efficient to take DOS 2 and tweak it a bit to make it fit some sort of quasi-5e gameplay. Then, because certain things were more dramatic and volatile, they made other things, like shove, more dramatic and volatile to try to compensate to fit their DOS 2/5e mechanics hybrid.