In the comics, Dick Grayson gives up being Robin when he decides to lead the Teen Titans and carve out an identity of his own. However, Titans looks set to change that in a huge way because star Brenton Thwaites has revealed that the reason his version of Robin leaves the Caped Crusader's side is because he's become a murderer and has actually started teaching his sidekick to also kill criminals. Wait, what?!
This is quite a departure from the comic books and something which is bound to upset a lot of fans as Batman isn't traditionally portrayed as a killer, and has a strict no-kill policy. Considering the fact that Jason Todd is alive and well, it's hard to imagine what could have pushed him over the edge and many fans are already speculating that this means the series takes place in the DCEU.
"Batman is a killer and Robin wants to get away from that. The idea is that he doesn't want to become a killer himself. And although these guys that he's fighting are bad and they deserve, you know, they deserve what he's dishing out, it seems, he believes that when you kill someone you crossed the line and you become almost as bad as them, so it’s pretty clear in the series that he was with Batman, Batman crossed the line and he was teaching me to do the same thing, and he’s trying to break away from that."
Well, that explains the "F*** Batman!" line and it's fair to say it may actually have been justified...