Xavier or Tyler?
Honestly - they both were miscast and no one is hot enough. Xavier was just annoying. And kept whining all the time.
Tyler was like a cheerful puppy all the time. And when he turned up bad - actor just couldn’t deliver that transition to villain. They should have made him amnesiac and spelled. So that he would not understand what he was doing. Because him being this enthusiastic cheerful puppy all the time and then being secret maniac was not looking believable.
And then they didnt even killed him and left for second season... Why? He is done. I hope they dont do a redemption ark for that maniac.