Shinji did nothing wrong.

FSN is just written to make him out as the bad guy, when really he's no worse than any of the 'protagonists' and a better person than most of them.
What are the main complaints? He raped Sakura and stole Rider to use in the war?
Okay, let's get this straight. He never fucking raped Sakura. He never did it. He never did it. He never did it. He never did it. He fucked Sakura.
Let me ask you this. WHO IN THE GAME DIDN'T FUCK SAKURA? You can't even name one fucking character who hasn't plugged her loose cunt! She is the kind of bitch who will act like she doesn't want it when she really does. She'll say No! while having multiple orgasms. Shinji knew this, he's a fucking ladies man. He knows what filthy whores like Sakura want.
And there's this other big bitch you guys have with him. He supposedly stole Rider and used her in the war for his own greed.
Objection! He was worried about his one and only precious sister. Is keeping your loved ones from a brutal war so wrong? When Shirou does the same thing to Saber it's like 'oh he's so manly', but when Shinji does it it's wrong? He just wanted to protect Sakura. He probably was going to use his Holy Grail wish to tighten her cunt back up or cure her syphilis or something.
The story was written to make that faggot Shirou look good. Objectively, Shinji is a far better character than Shirou. At least he has the balls to take action decisively instead of dicking around like Shirou, and if he weren't stuck with the weak ass servant Rider and no plothax he probably would have won the war.

and if he weren't stuck with the weak ass servant Rider

that sexy ass servant is not weak if she has a competent Mage commanding her.

I honestly just find anything from the Fate route boring, partly because it's just the info dump route, and partly for the logic some servants used.

So yeah.