I quite agree with you, I have hated this season. The biggest issues I have with this series come down to two characters Clara and Danny. Their romance, I didn't buy it for one second. I understand nervousness around someone you're attracted to but, my goodness, that was just a whole different level of uncomfortable before "The Caretaker."
I also only liked Danny in "The Caretaker." When he was introduced, he was the same, boring soldier character I've seen so many times before and he never really developed beyond that role until "The Caretaker." His first introduction awful. Crying I front of your class? seriously? that scene was meant to make me pity him but it just made me against him the rest of the season, not because I believe in gender roles or whatever, but because Danny tried so hard right up front to make us pity him and make his class pity him. It didn't work though because I wasn't emotionally invested in this character so why should I care.
I don't want to talk about the finale so I will list the only things I liked. I enjoyed the female version of the master and the death of osgood. those two things can't save the episodes and I will never watch those episodes again, but they were good.
When it comes to the Christmas episode, my main issue is I became so confused. So we've got the face-hugged a from alien climbing on peoples faces so inception can happen. Inception is tied with Les Misérables for my favorite movie so I should like the dream within a dream stuff, but here, I just don't. I was so confused on if everything was a dream or not and there were so many fake-out endings. Okay, so santa is meant to show that your in a dream, right? So why was there a tangerine on Clara's windowsill at the end of the episode? Are they still in a dream? Also, does that mean all of Doctor Who is a dream because, remember in "A Christmas Carol" when the Doctor showed a kids a picture of him, Einstein, and SANTA at a club or something.
I didn't really care for the elves or Nick Frost in the episode either to be honest.
Also, I think now that the series is over the show needs to be renamed after the main character of the show, Clara. Did you notice how the new doctor was basically put on the back burner so Clara could have the spotlight?
Any way, that's my thoughts on this season. I have many other issues, but those are the main ones. Other than the first season of the revived series, I think this is my least favorite season. I got through it though, something I can't say about the first season.