Bran, Bronn, Arya, Sansa & especially Varys, Jon, Tyrion & Jaime
the first 4 I mentioned didn’t necessarily go nowhere, they just didn’t fit or be consistent with everything up to that point, but the last 4 had total character assassination, I’m not sure how you can say Brans was the only total bullshyt ending to an arc but not those, they were written to act completely out of character no matter how much it didn’t make sense to their characters or intelligence just to wrap it up in the 6 episodes they had, literally the definition of forcing square pegs into circles
eurons ending was some garbage too
Bronn, Varys and Tyrion were shells of themselves by the end writing wise and for damn near 3 seasons as it is, but there was nothing in their respective endings that stood out as particularly off or inconsistent to me. Bronn was always loyal to Tyrion, Varys remained loyal to the realm and Tyrion was the loveable fukk up that was in too deep and couldn't talk his way out of the fukkery he was in.
Arya traveling the world after the shyt she saw made sense to me, especially with the parallels they drew between her and Nimeria - it was inconsistent given how vocal she was about the pack keeping together, I'll say that, though. Sansa being Queen and protecting the North was more than fitting to me, but
That leaves Jaime and Jon.
Jaime's end honestly pissed me off, but the last thing you can say is that it was inconsistent with his character. No matter what, he was always about Cersei, no matter how evil he knew she was. He was devoted to her. Their story was the ultimate love story of the show. He was completely devoted to her to his downfall. His end is maddening given the development his character had, but always going back to Cersei was his nature. It was annoying, but very fitting.
As for Jon, his end pissed me off the most in real time because I wanted him to be on he throne, or at bare minimum to stop he Night King, so his storyline is who I paid attention to the most throughout my rewatches to at least make sense of the decision. He was built as the hero, he was supposed to be the hero, and honestly should have been the one to kill the Night King, but beyond that, his story was laid out damn near from jump. "Love is the absence of duty" "Do you know who I could have been if I just said the words?", being killed by his men for trying to do right, seeing his father get killed for doing the right thing, all of that shyt from his early beginnings helped lead him to just want to be free of all the bullshyt. Even in being made King in the North, be accepted it out of duty for his people, but never WANTED to rule. They alluded to Jon's end and actions several times throughout the series and him going Maester Aemons route, in retrospect, wasn't the dope ending, but was very much the right ending for his character and brought a lot of shyt full circle to me on rewatch.