I'm probably reiterating points that have been made a number of times before, but I urge you to go back, listen to Hammerheart at LEAST 10 times, and then re-evaluate your opinion.
I insist upon it, because from personal experience, Bathory isn't a band that you can "get" listening to at a friends' place... it takes private listening, preferably on headphones (which will at least help you appreciate the level of detail Quorthon puts into his music). There's a certain magic about Bathory, and I think that if you let yourself find it, you'd stop robbing yourself of one of the greatest bands ever.
But feel free to not.