This series actually made me dislike Kitty due to how often she was thrown in our face as being a competent leader that had to direct the others constantly. For me at least, it almost felt like a Kitty solo series with multiple guest stars.
I’ve never been a big fan of the Rachel and Kurt pairing, so this also didn’t work for me.
Finally, as a huge Rachel fan it was just painful watching the amount of abuse she was put through in this series. How many times was she taken out and had to be hospitalized? 3? Then mind controlled by Mesmero. Sigh.