That is all true. But from an out of character perspective, talking about people disliking the companions and not being satisfied with them as all we get in the party, that's why people have an issue. Honestly, I'm not even one of those people. I do wish we had one or two more firmly good companions, but I like what we have for the most part. This isn't truly about in-character actions, it's about players not liking the characters.
It was not an accusation, btw.
It is very difficult to make characters liked by all, especially when there are so few of them. It is also understandable why the number is limited. Quality over quantity.
The theme is fighting your own demons and temptations. I think there is too much nostalgy towards the Original BG saga (I have played it until the ToB), which frankly speaking is too much black-and-white, good vs. evil type of game.
As for the truly good character we have Minsc and Halsin, at the very least. Maybe more
