I Prevail did what all the damn bands that become known by internet do: Make a few covers until you get enough recognition to do your own music and dont waste money and time producing something nobody is going to hear. These dudes blew it up after that EP of covers, and they did a great album after it, but they are wasting their talent doing this. People hate on them, i think (at least is my case) because they are wasting their talent doing what already half of internet does trying to have what they already have: A solid fanbase, in other words: having the chance of do their own music and be heard by a lot of people.
Honestly i don't mind a cover sometimes, for example, a lot of bands did covers after Chester and Chris Cornell passed away. And it's cool to do a cover if you feel you need to or if it means something, but this thing of do covers a week after only if the song went freakin viral (like always covering the same 5 pop viral artists of the moment, at least they had dignity to don't do a despacito cover) to get views and money is kinda sad after songs like "Sunrise" or "Same Old War". Like i said, they have something to say and they have the resources to do it in an artistic and listeneable way.
In resume, they are good musicians, they are just wasting their talent for easy money and easy views, a shame because if you want that just go and do generic pop/rock music and don't do post-hardcore (a genre that isn't so mainstream at all), but well