I get the feeling a lot of people are bandwagon-jumping in their bizarre hatred.
I don't know. That seems a bit presumptuous on your end to suggest that people have to be simply following the crowd in order to dislike Nemesis or that to dislike it is somehow bizarre.
For the record, I am a fan of both TMP and TFF, so I know something about going against the grain of Trek fandom.
However, I have to say that I do strongly dislike Nemesis and find very little redeeming about it. There are a few moments that I like -- I find the prepping for battle sequence backed by Goldsmith's great music to be enjoyable, and I actually like the sequence of Picard and Data escaping from the Scimitar in the scorpion craft. And that's... about it.
The story is very weak to begin with, it's badly directed, the characters are way off, it eschews anything even remotely resembling depth and character moments in favor of mindless action, the potentially moving sacrifice of Data is undercut by the absurd B4 subplot, and even the big battle sequences -- which even most Nemesis detractors seem to like -- just fall flat for me and seem 'off.'
So, no, I don't like Nemesis. But, no, I'm not just jumping on the bandwagon. I've got my very strongly felt reasons for disliking it, as indicated here.