Sure, DOSII was really very hard in HM (Kemm vs Arhu, Adramahlik or Alisceon f.e) but BG3 is really hard in tactician if you don't spam F5~F9 to optimize results (or reload after your group didn't deal enough damages).
For a more difficult game in Tactician, LARIAN just have to desactivate F5/F9 we can spam without limit in any situation (middle of a fight, cutscenes included, before a dice-rolls...). For gameplay, global difficulty (in any mode), and credibilty of game achievements, it's TOTALY senseless.
@who_want_a_harder_game : try to make a run only saving when you quit, only reload when your entire group RiP, accepting failures, and do the last fight only helped by 2 invoked heroes (cause you missed quite all with your low persuasion/charisma habilities) and come back posting here
