Probably Nickelback. I'm no fan, but they seem to get the most hate of anyone just for being mediocre.

Imagine Dragons. Someone correct me if I'm wrong, but my understanding is:

They picked up hate for being marketed like they're some kind of super hard rock, even though they're not. But their music is good for the genre it is. The lead singer was raised Mormon, but is now an activist for LGBT youth.

I've met so many people who hate Meatloaf. I think Bat out of Hell is a top 10 album.

Ghost comes to mind. I’ve never had a problem with them and a lot of their songs I think are pretty good. Seems like they get shit on a lot though.

Hanson. Their curse was that Mmmbop became THE hit early in their career. Their later stuff is in fact alright and with a lot more skill involved than a single repeated hook.

I'm sure "most hated" has already been covered, so I'll go farther down the list and pick one that's a little hated and IMHO more than "not bad": Crash Test Dummies.

Mmm Mmm Mmm Mmm gets clowned on by people who remember it, but (1) it's pretty good, and (2) CTD's first three albums are full of super catchy folk-pop-rock with decent lyrics. Some of the third album, and then subsequent stuff gets deeper and deeper into Brad Roberts' then-current interests and generally doesn't grab me, but more power to him.

Mmm Mmm Mmm Mmm itself was undoubtedly picked to be sonically polarizing and grab more attention than some of the slightly less "Crash Test Dummyish" tracks.

Lars Ulrich of Metallica is I think the most hated metal musician today, with the Napster case and his recent performances which are way too snare-heavy if you ask me (some would use the word "lazy").

But the large majority of the metal scene acts as if he was the worst drummer ever, which is obviously not the case. If you go and listen to Metallica's 80s and early 90s stuff, including bootlegs of live performances, this drummer is more than capable, but he also invented a lot of fills and patterns that came to be used prominently by others, like Mike Portnoy.

So I'm not saying this in defense of the guy - don't know him personally - but that's a blatant case of people not listening with their ears if you ask me...

Nickelback hate was pretty bad but got better I feel. Animals is a banger.

Smash Mouth wound up getting overplayed with "All Star", but their debut Fush Yu Mang is excellent. Way better than you'd expect, and it's worth a listen if just for their first radio hit, "Walkin On The Sun".

Currently Imagine Dragons. But I remember when Nickleback also was the butt of many jokes despite not being a terrible band.

Justin Bieber. He can play like 5 instruments incredibly well. He didn't handle fame very well and they kinda forced him to be what he is.

Taylor Swift, the modern version. She used to be a genuinely talented singer songwriter but has gone way too far into the popstar life. I remember her playing solo songs on an acoustic guitar, and she was good.

I mean people like Chris Brown and Kanye both make themselves hated for things outside their music. Then there are people like Prince who would act like they were all high and mighty and have his staff tell everyone to not look him in the eye or even look at him. Was his music good, sure... But if someone told me not to look at him I'd mark it as a red flag and not buy his shit.

At least in the thrash scene, Anthrax gets shit on a lot for being part of the Big 4, however I fucking love them, even though they had a period where every release was dogshit. Their early stuff is peak thrash, which is good because nowadays they mainly stick to playing their early stuff. Still deserving of their position. Though sometimes I wonder if it should be a Big 5, including Exodus, who were one of the first.

Moby. Play is a great album and I play that shit at least once a year.

NOFX gets a lot of flack, I love their music.