Why I don't like RE5:
Weapons weren't as cool or varied compared to RE4. While RE4 may have less weapons, each weapon felt really different. That combined with getting a special weapon ability for fully upgrading and RE4 gets the edge there.
RE5 isn't spooky at all. People say RE4 isn't scary, but there are a lot more tense moments due to enemy design and how some confrontations played out.
RE4's story was goofy and is endearing in a fun, dumb way. RE5's story is just dumb with no fun.
Boss fights in RE5 were good, RE4's were much better.
Level design. RE5 has some really shitty areas spread throughout the entire game.
Fuck co-op.
I know I just compared RE5 to RE4, which is considered one of the best games of all time, but if your game is a sequel to RE4, and has the same exact mechanics and gameplay, but it ends up being worse in every way barring a few small things, that sorta sucks ass.
RE5 isn't a bad game, I just don't like it. And some RE5 content is paid dlc, which I have never gotten.