Mmm, that's kinda true too. I just finished the latest series and uhhh yea, I'm ready for 11 lol. Bill was ok, but never really transcended past the most basic companion traits. I kinda feel bad for her though because since she only had one season, this means she succumbed to the Doctor's baggage and fallout from dangerous adventures the fastest out of all the companions (to my knowledge).
Oh for sure, Rose is still my top most disliked companion.