These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Critical Dissonance: They are praised highly by musicians and critics, but not even getting praise from Rob Halford (yes, the Metal God himself) seemed to stop them from being hated by at the very least half the metal fanbase.
Face of the Band: Frontman Oli Sykes. Lots of his female fans don't even listen to the band (or heavy music at all). Also, it isn't terribly uncommon for an attempted conversation about the band to go a little like this: "Hey, uh, you ever heard of Bring Me The Horizon?" "Oh man, I hate/lovethat guy!" That said, former guitarist Curtis Ward was pretty popular as well, probably thanks in part to being a bit of a Large Ham like Oli.
Newbie Boom: They are a case of this for metalcore, essentially providing the breakdown-loving Emo Teen crowd that would go on to fuel the entire second wave of metalcore (Especially in the UK, where metalcore never made a large impact to begin with).
Nightmare Fuel: "For Stevie Wonder's Eyes Only" aims for this with such lines as "I whispered in her ear: fear me, dear, for I am death".
"Don't Go" certainly qualifies, especially the interplay between Lights and Oli which is then followed by an epic and heart rendering guitar solo.
"Sleepwalking" from Sempiternal
Same could be said for "Hospital for Souls" of the same album.
The Scrappy: They are currently one of the most hated bands in the metal scene, if not one of the most hated metal bands in history. It's very hard to find a metalhead trying to defend them, and even harder to find one who admits to being a fan. You'd think that as a band that so few metalheads claim to like, that they'd get less recognition. The reasons behind their strong Hatedom aren't exactly known, though.
BMTH has actually matured and refined their sound very much since their debut, and as of now they are actually a very mature and nuanced band with a strong sense of song craft. Their hatedom does not seem to descend from their music, but from their image, since metalheads tend to hate metal influenced bands with a non masculine image. In fact BMTH is currently one of the most innovated and experimental metalcore bands in general as of "Sempiternal", and is probably one of metalcore's biggest Ensemble Darkhorses.