I played the game and loved it. I used audacity to create looped versions of the songs, so I listen to undertale music a lot. Spider dance is my 3ds home menu music
But yeah the community seems weird. I also tried watching a blind playthrough once but they got angry at him for killing [you know who] and wanted him to restart. That's just how the game works and is even designed to lead you to do, I killed them first my first time too .-.
He hated all the characters and the humor, killed everything, and didn't explore / look for all the little details that make the game great. But it's definitely not for everyone, it's probably just not his type of game in general.