I don't think anyone blames Kit Harrington or any of the actors for the direction the show went. I understand seeing "I dun want it" memes and feeling like they're directed at you, it's your face, you spoke the line and realistically in character that was really what your character felt.
I also think that large parts of the ending we got make sense and are likely where the story, at least in George's mind, will end. The difference is that it won't all happen in a few episodes. As a character you can understand how everything that plays out makes sense.
But we didn't see that in the show. That's not what's on screen. Things happen too fast. Character motivation lost. Characters feels change. All within minutes.
And then you have things that just don't make sense. We're teased a fight between Jon Snow and the Night King at Hardhome. Instead Jon screams at a dragon. Arya, who has no connection to the Night King, kills him. Tyrion, the smart one, hides in the crypts full of dead people, but we know he can revive the dead.
The list goes on and on. I can rationalize it if I really need to. I've had years to think about it. Maybe Jon was distracting the dragon. The Night King didn't know about Arya. She is a master assassin after all. Bran was bait. He knew he was bait. Bran set the whole plan up. But none of that was on screen. That didn't happen.
I don't know where this ranting is going but in the end the story told sucked. I blame the showrunners. I don't blame Kit Harrington.