What is The End of Evangelion?

Extremely fucked up anime film that is an alternate ending to Neon Genesis Evangelion. There's legitimately no way to explain its plot, you simply have to experience it for yourself and feel it. It's an absolute fucking emotional rollercoaster of a film and it doesn't apologize for what it is. It also has extremely beautiful but horrifying visuals. It is the ultimate definition of a mind fuck.