This sort of behaviour has bothered me for years it feels like now. I see it all the time and there are so many youtube comment replies I have written and deleted instead in reply to some of these comments.
I've always thought it comes down to this; people hate being wrong.
For someone to be all excited about an upcoming game, to spend months awaiting it, dreaming how good it's going to be, maybe even pre-ordering it and then to be told it's not actually that good, I think people take it personally. "You idiot, you thought this game was going to be good, it's fair at best."
This can also happen after a game has come out where people have invested time as well as money in the game and don't want to feel like it was a waste.
It is getting silly though. I saw one comment on Gamespot's episode of The Lobby where they were talking about Mafia 3 that said "I don't care what you say, this is going to be my GOTY". I hope that commenter is enjoying the game.
Should have waited man they got some kind of SE coming out in Nov I think. Find a bunch of songs you want to learn and just add tab at the end of the search you should find it fast, but UGT is one of the best. Good luck it's all muscle memory in the beginning.
I'm pretty sure they are having a free update for the original 2014 version to the...new 2014 version.