I mean. what they did wrong was the Governor in the comic was a LUNATIC and the problem with that character is it makes zero sense why anyone would follow him.
A guy who rapes, murders, kidnaps and mutilates... you're left wondering "why the hell are his men so loyal to him??" Like you get the whole being happy to have shelter aspect, but at some point people put this crazy person in power and let him call ALL the shots. And in the comic he's getting them killed in scuffles with the prison because he's so insane and so irrational. He keeps his daughter not to cure her, but because he's crazy. And he'd feed people to her. He has the heads because he watches them like TV. With a remote control. It's very clear that that governor enjoyed the fact that the world had ended and THRIVED in it. He is CRAZY.
BUT
It made no sense that he would be the leader in the community, except for "well it's a dystopian future and you need someone willing to make the tough calls" but that's a weak justification and wouldn't translate to cable tv.
So they tried to humanize him a little bit. made it that he kept his daughter because he was looking for a cure. Made him back off the rape incident because he isn't a total monster. Had merle beat up Glenn instead of him doing it himself. Had Martinez giving some of the crazy commands and when people were like whoa that's nuts, he'd come in with a lie to cover it up and make things seem sensible. He hasn't executed any one to scare the **** out of people yet. They spread out his crazy amongst 3 different characters, so what we're left with is sort of an ambivalence towards the TV Governor.
He's no more scary to me than Martinez. He doesn't give off that desperate "This dude could do ANYTHING at ANY moment and you always have to be on guard whenever he's on screen" vibe. And that's why the writers failed with this incarnation.
Either ramp up the crazy in these last episodes, or kill him off and let's move on. Cuz so far he's a failure. Rick wanting to give up Michonne is just as off mentally as a character.