What are some things that people hate not because they genuinely hate it but because it's trendy/cool to hate it?

the first thing that came to mind is nickelback, creed and limp bizkit (although they have gained more popularity and traction from tiktok) people still hate on them because everyone's been hating on them since like the 2000s even though they're great bands. they may not be everyone's cup of tea but the majority of people saying they suck haven't even listened to them 

Music is definitely always a target once it gets popular, whether a band or a female singer.  I've noticed that the trend to hate on Labubus framed as “anti-consumerism” is still hanging on.  Especially with the resurgence of “Satanic Panic” with a dash of AI that's given us the Pazuzu-Labubu brainrot inducing word salad on a grand scale.

It's frustrating and almost sad that certain people can't seem to allow others to enjoy whatever makes them happy if they themselves don't like it.  They feel it's their place to then attempt to tear others down.  Some even going so far as to purchase the thing they hate (in this case, Labubu dolls) to destroy them by burning them or cutting them up and then documenting it online.  Insanity, honestly.

Pineapple on pizza and Android phones. 

Sushi.
Everyone loved it and suddenly, boom, now everyone hates it and its considered a picky eaters food? Idk, sounds weird to me lol.

People still hold the same grudge and hatred for twilight almost 20 years later, which is odd because like 30% of the population has switched to this weird acceptance of it where they pretend it was always cool. 

Not me though, I've loved that garbage since 2007. 

I agree so much with the t=Taylor slander. She's not even half bad, just a bit bland for me but she does have some bangers.

To be honest, a lot of things that are popular on this sight are hated on most places, especially like childish things like mlp and fnaf. A lot of people kind of have to look inside themselves because a lot of things people can genuinely despise are things that are just meh or you can be indifferent towards but for some reason they NEED to hate them, yknow? I'd say a lot of people are a bit pessimistic at the moment, though.

Labubus seem to have a terrible rap too. I don't mind the look of them, and I won't buy them purely because they're mass produced pieces of plastic, but people enjoy them and love their dumb faces, so I don't mind them because I can understand that :D