Yeah, it's disappointing as his average STR/high WIS seem very out of character.
BG1/2 understood that you could and should break a few rules when designing the companions. Like giving Minsc the unique Berserk ability and dumping his WIS far below the minimum requirement for a ranger. Was it optimal from a powergame perspective? No, but it made him feel really unique, and his personality synergized with the stats he was assigned in a really flavourful way. That was unfortunately erased in BG3.
