Saying the Pathfinder companions are a "bunch of walking tropes and cardboard cutouts" while praising the BG3 ones is certainly a statement...
BG3s companions are flashy because Larian threw money at VA and cinematics. But they are all style with only weak substance.
100%.
I would go on to say BG2 has more well written characters than the entire BG3 cast.
Why is it that I can replay Pathfinder Wotr, BG2, IceWindDale, Planescape Torment, PoE2 Deadire, Fallout 2, Disco Elysium...and still have tons of fun, yet with BG3 my second play-through was pure torture? Particularly after chapter 2.
Imagine taking away ALL VA and cinematics from BG3. Replace dialogue with text, and thing about the game content again.