I think that the real problem was Betsy's "lack of personality"
One of the things that I didn't like was Betsy trying to be the "good girl". She's fierce, respected, people know that she should not be underestimated (Like when Colossus asks if Betsy powers has shifted again, telepathy rather than telekinesis, because the timing was unfortunate if they needed a heavy hitter. Then she knocks him down and says "heavy enough for you?"). But in the hands of TH that personality was completely erased. She was always needing help, always lowering herself to please others, always trying to prove to others that she was capable of. She's not like that, she's the type who gets there and does it!
Having her in the hands of the Steves was a wonderful thing, her personality finally back! To see Betsy like: - "punch yourself in the face!" or "Danielle, I intend to do something rash and violent." or "Oh, I wasn't asking for backup -- or permission." it was something incredible!
I think the only times (that I remember) where she acted like that, at the hands of TH, was against Arthur and when she killed Merlyn.