Yeah, I get the idea of being bothered by low quality copycats cluttering the music scene and making it harder to find the good stuff. If you think Nightmarer is low quality then that's your opinion and that's fine. But I've really never understood the idea of fans of X being bothered by high quality bands that sound similar to X. A sound is never going to stay exclusive. Why would I not want more of the sound I like? I don't care who makes it. And to my ears Nightmarer is pretty damn fresh, the modern production, groove, low tuning and atmosphere of Meshuggah and perhaps more of a deathcore sound, crossed with dissonant death/black metal isn't something I have really heard elsewhere. It's definitely more accessible and I can hear a lot of reasons why modern dudes from the less kvlt side of things are into this band but not into the more raw stuff.