Why genres of music tend to be completely useless.

Genres of music can be useful to a certain degree, it helps to figure out what kind of music a person likes and you can at least somewhat gauge if a person would like a certain band or not, that is until the internet takes hold of it and warps it into something hideous, a great example of this is Metal and its ridiculous list of genres and subgenres, for example (from wikipedia):

Metal

• Black Metal
  
  
  
  1. Melodic Black Metal
     
  2. Symphonic Black Metal
     
  3. Viking Black Metal
     
  4. Ambient Black Metal
     
  
  
• Death Metal
  
  
  
  1. Brutal Death Metal
     
  2. Melodic Death Metal
     
  3. Technical Death Metal
     
  4. Progressive Death Metal
     
  
  
• Doom Metal
  
  
  
  1. Epic Doom
     
  2. Drone Doom
     
  3. Funeral Doom
     
  
  
• Drone Metal
  
• Folk Metal
  
  
  
  1. Celtic Metal
     
  2. Oriental Metal
     
  3. Medieval Metal
     
  
  
• Glam Metal
  
• Gothic Metal
  
• Groove Metal
  
• Industrial Metal
  
• Metalcore
  
  
  
  1. Mathcore
     
  
  
• Neo-Classical Metal
  
• Nu Metal
  
• Post Metal
  
• Power Metal
  
• Progressive Metal
  
• Sludge Metal
  
  
  
  1. Atmospheric Sludge
     
  2. Southern Sludge
     
  3. Stoner Sludge
     
  
  
• Speed Metal
  
• Stoner Metal
  
• Thrash Metal
  
  And also;
  
  
• Fusion Genres
  
  
  
  1. Altrnative Metal
     
  2. Black Doom
     
  3. Blackened Death Metal
     
  4. Crossover Thrash
     
  5. Death Doom
     
  6. Deathcore
     
  7. Death N' Roll
     
  8. Grindcore
     
  9. Gothic Black Metal
     
  10. Goregrind
      
  11. Industrial Black Metal
      
  12. Melodic Metalcore
      
  13. Neo Classical Metal
      
  14. Stoner Doom
      
  15. Sludge Doom
      
  16. Symphonic Metal
      
  17. Stoner Sludge
      
  18. Viking Metal
      
  
  

Do you know how many of the genres aren't completely bullshit and fabricated? Eight. That's right, eight. Black, Death, Doom, Glam, Metalcore, Nu, Power, and Thrash. And of those, Nu Metal isn't even really metal, it just fucking blows. Why do all of these different genres of metal even exist? Seriously, what the fuck is wrong with the internet?

Let me run down the genres that really exist:

1. Black
   Eurofags from Norway and Sweden who like to think they are badass for burning down churches and like to wear corpse paint. Black metal is terrible 99% of the time and the 1% that isn't terrible is probably called bullshit by the Blakc Metal community. People who like black metal think that all other forms of metal arent true metal, they will even call bands like metallica non-metal even though they invented metal, in essence black metal is almost always terrible and the fans of black metal are all fucking idiots.
   
2. Death
   Death metal is heavy and fast and awesome, but filled with a bunch of idiots and shitty bands. there are bands like Dimmu Borgir and Amon Amarth are the standard bearers of death metal and they both sucks. Any good death metal bands are labeled by death metal fans as fake, sellouts, ect ect because they dont suck like most death metal bands do. For every metal fan who enjoys Black Dahlia Murder there are a dozen who think Arch Enemy is the greatest thing ever. But, see, the thing is that Arch Enemy is terrible and sounds like kittens getting steamrolled.
   
3. Doom
   If there were emo kids of the metal world, this would be it, its slow and depressing and all of the brutality and energy in metal just dies when people play doom metal, it sucks and so do the people who like it. Corpse paint is for fags.
   
4. Glam
   Glam metal is what metal almost turned into if it weren't for Metallica and Slayer, glam metal bands are the hippies and wimps who wore makeup and had long stupid girl hair and pretended to play heavy metal. Poison and Scorpion almost killed metal and Glam metal is all but dead now which is awesome.
   
5. Metalcore
   There is a reason metalcore is referred to as the pop form of metal, because there are so many bands that dont sound any different than another band its disturbing. There are a ton of awesome metalcore bands that exist contrary to what death and black metal fans say, but for all the good ones there are at least twenty which sound exactly like it. Regardless, metalcore is awesome because it mixes punk and metal and that's just a factory of awesome.
   
6. Nu
   I like to call it mall metal because its for people who like to pretend they listen to heavy music but also like to listen to nickleback and jerk off to Kid Rock. It sucks and its not real metal.
   
7. Power
   Thank you Iron maiden, because now we have metal-hippies, sure dragonforce rules, but seriously power metal isnt all that great. I might listen to a song or two by dragonforce but really, its not that great of a genre and most of the fans are pussies.
   
8. Thrash
   Metallica, Megadeath, Slayer, badass bands that haven't had a new innovation in twenty years. Sure thrash is pretty awesome, but there hasnt been much in the way of interesting thrash metal in about the duration i have been alive.
   

Basically, in the end, genres are pointless. Metal is metal, if it's not awesome and not brutal its not metal, that's how it works. I think Maddox said it best when he said that metal si the only form of music in danger of dying out because all of the fans would kill each other. Its true, I hate 99.9% of metal fans because they are fake useless assholes who like to pretend to be into heavy music but then go home and listen to hawthorne heights and cry about how badly their middleclass life is. Metal should be reserved only for people who understand how awesome it is, metal is the end all be all of human art form, the greatest achievement of mankind outside of bacon, and almost no one understands its greatness. Also, people who dont listen to metal are pussies and should get hit by a bus.