The only fan fiction I ever read was Evangelion Retake. It was literally the shittiest thing I ever read. It was written by some deranged Asukafag that has obviously never been laid. She killed off every female character because she was also paranoid about her own -blam!-ing story, and turned a mecha deconstruction psychological show into Lifetime 2.0. "Rei dies because I said so, and Shinji has sex with Asuka immediately after he sees Rei dead and decides to marry her the next morning! And then he invites his dad for some reason and Misato dies before the wedding too because she might interject in the wedding even though I'm the batshit insane bitch writing the story!" The above is literally what went on in the head of whoever the Hell wrote Retake.