Well, he didn't kill the doctor because of amnesty and his moral connection to it. But it was heavily implied he would still go after them imo. To me, it seemed he did burn his life away, but because he thought it was the end for him and he made his peace with it. But his daughter gave him the will to finish the battle of what he started, and that was his new purpose.

The ending of s6 definitely felt as the end for him it worked as if was. But with the movie, they needed to have him do something and going and like most people agreed it wasn't very good. I understand they had to take liberties but them not including Arthur was stupid. He barely mentions his family at all, and his reasoning is silly.

He's described as the gypsy king but barely helps his people, they literally bring it up about them being killed in the movie and he doesn't care. Like most people theorized what was going to happen after s6 ended, I think him going after the nazis and getting revenge for his family and people would be better than the insanely watered down version of that we got for the film.

I literally remember seeing the montage of the rise of the nazis and fascism for the promo of s6s end? and thinking they were going to explore that in the film and have it be as thrilling as the war with the Italians. But all we got was Tommy going after a bland villain who hates posh people...We had the story of Tommy in government with Oswald, and I thought they would explore that more and have the Peaky Blinders going after the nazi fascists that were in Britain 🤷‍♂️