If the action scenes were cut in half and the cut character scenes were restored then there still would've been stupid things about
Nemesis but it would've made for a much better film and, in turn, I would've been more willing to overlook plot threads with silly execution like B-4 and Shinzon irrationally going after Earth.
I'm willing to look the other way with a lot of things if the overall quality is high enough. Such as with ST XI.