The issue for me is that every fight is balanced like DOS2 in that every single one can potentially cause a TPK. This is fine in Divinity, but in 5e every fight does not need to be so difficult. If this was an actual campaign of this difficulty, then this DM would have no players. They need to take a long hard look at whoever is in charge of encounter balance and remind them that this is a DnD game not a divinity one. (No problem with DOS2, it’s maybe my favourite game of all time, but if I play BG3 it should play like a 5e game.)