Yeah but he put it on a record and then stands by its existence regardless of public fallout like most of Pretty Hate Machine for example, which you can tell he dislikes somewhat but appreciates still as a reference point for where he was in his life. "Everything" is where he was at that point in his life and I can't argue against it. The man puts his feelings in his music and the people shit on it, of course he's gonna be upset when people don't like his feelings because alot of people believe Trent is a very angsty negative dude and can't be positive ever. I'm pretty sure he doesn't hate the song he just hates how people reacted to that side of him and that's understandable.
I feel like people just don't like straight forward upbeat rock NIN. Songs like "Getting Smaller" and "Not So Pretty Now" are polarizing to fans and now "Everything" has joined it. I like all three. Just my opinion.