I should not hate champions I love

I just played a game as Nasus and I know he isn't the strongest champion nor do I want him to be. My issue is that I went against a Riven that made the entire game he'll for me. I love to play Nasus and I usually do fairly well but I can't really play him how I want anymore because of how other champions are balanced. I am not completely against having a meta but don't leave champions who aren't apart of it in a spot where they can 0/9 because of one mistake. Please I have gotten so much joy from this game you made but it becomes very hard when I feel like I can't win and play things I love.