Honestly, the only reason I’ve heard is “she’s not Rose.” Using that logic, these people should also be hating on every companion that isn’t Rose, and every companion that has unrequited feelings for the Doctor like Jack and Amy.
Just because she saved the universe doesn’t make me not hate her. I can’t stand Martha because Freema was awful. She made Martha incredibly obnoxious and shrill. If someone else played Martha, I wouldn’t hate her as much.
Oh yeah, so, you guys should go follow my friend, Kaitlin. She’s the friend I converted into a Whovian, and she’s pretty kickass. She loves Matt Smith and coffee, and she’s still relatively new to the Tumblr way of life. Oh, and she’ll be the Amy to my Eleven at Comic Con next year.