The too-perfectness was a Gene Roddenberry thing. It was literally a part of the show's "bible" that characters didn't have any interpersonal conflicts with eac

The too-perfectness was a Gene Roddenberry thing. It was literally a part of the show's "bible" that characters didn't have any interpersonal conflicts with each other, because this was Gene's utopian future. It made it very difficult to write a good show. In season 3 they threw that out (somewhat) and focussed on character development.