As an X-Com player, I completely sympathise with how it feels to get awful rolls...especially when playing Ironman! In BG3, it can sometimes feel like a fight was decided by the rolls rather than player-decisions. However, that's just the nature of things when luck is involved. At least you can reload and try the fight again. Also, I may have been misinformed but someone on the Steam forums said they patched weighted dice to only act in the player's favour. Is that not true?
Having said all that, if the issue is that damage and attack rolls aren't being calculated correctly, then you obviously have a major point.
Lastly, I would imagine that the game will definitely have a Story Mode so all is not lost if that's what you're after
