Not liking things is the least-brave thing you can do.
https://imgs.xkcd.com/comics/unpopular_opinions_2x.png
It takes much more guts to admit that you like things, since that gives the assholes an opening to tear you down. (you always have the hipster defence: you're enjoying everything "ironically").
My main difficulty here (besides not watching a lot of movies, particularly modern ones) was not knowing what movies I like are considered unpopular.
Though actually Batman Vs Superman comes to mind. I'm not actually sure why people despised it, mecha-Batman freakin ruled. Luther being played by Joker was weird but hardly unenjoyable. I'd say the plot was contrived, but it was actually internally consistent as far as I remember - not to mention that heroes being manipulated into fighting is EXCEPTIONALLY common in comicbooks.
Anyway searching "movies rated under 50 on rotten tomatoes" (a common enough query to autofill surprisingly quick, people sure love XKCD <3) got me this Reddit thread full of movies I loved. I didn't verify because the Rotten Tomatoes website is a bit overwhelming, but here are some:
* Fear And Loathing In Las Vegas (49%) - though tbh, I *didn't* like this so much? It's an undeniable classic, I just didn't enjoy it.
* Hocus Pocus
* Swordfish (29%??)
* Last Action Hero (37%)
Though dang, none of those actually count because I was a kid when I saw most of them, and Fear And Loathing is 1998. Wait... Swordfish was 2001, and I saw it like a decade later, so it does count!
I guess Batman Vs Superman is a better example but the point is taken - I'm kinda scared to stand by it.
(I'd say Ghostbusters remake but that'd be trolling and I never actually saw it)