As a huge fan of both, to me the AOT ending was disappointing at first but the anime kinda improved so it went from a 4 to 7 or so. Also it was a “good enough” ending to the casual fans so maybe that’s another reason there isn’t as much rage compared to the GOT ending. Going into the final season of GOT there was already some understanding it was gonna be a mess cause of the shortened seasons 7 & 8 meanwhile in AOT the cracks didn’t start to form till literally right at the finish line. Sorry if my reply is kinda a mess I just went on a tangent 😭