Speak for yourself, loads of people love this series, me included.
I know how you are feeling, I thought Series 7 was the worst Doctor Who has ever been and I couldn't understand how other people were enjoying it. Different people like different things, that is the way things work.
I don't think Doctor Who has jumped the shark at all. All they have done is regenerated The Master into a different gender and if you really think about it, he/she hasn't changed a significant amount anyway. The Master and the Doctor always had a . . . thing and she is still pretty cruel, making Dr Chang say something nice about her before she killed him.
I don't really think Doctor Who can jump the shark anyway, they can basically do anything and everything they want. It will never run out of ideas.