Shusuke Kaneko's 2006 two-part live action adaption of Death Note received a tepid reception from Western fans and critics on release, even if general audiences in Japan seemed to love it, and they're two of my favourite films of all time.

Con air got bad reviews? I thought it was amazing. 

35... wow. Wouldn't have thought it'd be that low. Great film.

I think Predator (the original) is a perfect poster child showing critics actually do get it wrong, even overwhelmingly.  Predator isn't an amazing movie, but I think it's an overall good movie.  At worst a guilty pleasure movie, but not a bad movie by any means.

I think a lot of comedy movies from the 80s or 90s were deemed bad, like Boomerang for Eddie Murphy, but we are actually decent and entertaining

Con Air is 56% on RT and 52% on Metacritic.  Those scores aren't terrible, but they are definitely too low.  Maybe critics started hating Nicholas Cage even before he started making bad movies?  There are also these on Rotten Tomatoes:

National Treasure 1  46%
National Treasure 2  36%

2019's Godzilla King of the Monsters has a 42% rating on rotten tomatoes but I absolutely loved it.
It delivered exactly what I wanted; the monsters I'd grown up with brought to life in a whole new way with modern technology, beating the crap out of each other in epic fashion. And that soundtrack. *Chef's kiss*

John Carter actually sucked.

I thought the Robocop reboot from 2014 was pretty good. Also the Child's Play reboot.

White Chicks