No, the result was the right result, and the fight was pretty good, albeit not necessarily the way I envisioned it, and way too fucking early.
The totality of everything after that fight is ass.
This should have been a 400 to 500 chapter manga, quite possibly as high as 600 at a stretch, depending on how far and wide Gege could go with world-building. The manga ended when the IP just hit the beginning of its critical mass expansion.
And not only did the manga end absurdly prematurely, the ending fucking sucked and left a lot of loose ends. The IP is going to leave billions in unrealised revenue on the table because of this historically inept management of creative and IP.