Frankly I have no idea what people mean when they say "You can't really compare DOS 2/BG 3/POE II/WOTR". Yes, you can. They are literally minor variation in the same exact genre.
I mean you can, but it's pointless.
I disagree that difference between Larian RPG and Obsidian RPG is minor - one prioritises online play and player interaction, second one worldbuilding and story. That IMO makes them fundamentally different experiences. You CAN play Larian RPG as you would PoE2 or Pathfinder, as I do, but that means missing out on a major focus on the game - which is coop.
I wouldn't claim that D:OS2 was worse then PoE2, it's just that coop RPG (coop centric, not RPG with coop mode) is not something I have much interest in. It doesn't make D:OS2 bad, it's just makes it bad in things I care about in an RPG.