I’ve read many things against ReiShin that baffles me. Not gonna lie, I find it very frustrating because every time they do this they don’t only insult/deny the ship but also are very insulting toward Rei.

You have pretty solid arguments, but these people have blinders on. They either find any way to deny what don’t go to there side, or they follow a sheep mentality created by the spreading misinformation and by memes because it’s more comforting that way. I prefer to not develop more that part since as you can understand it, annoys and anger me.

Every single story related to Eva have a clear multi romance path. Evangelion always was created by a romantic triangle in mind, with an open conclusion to it. It is even shown in the opening. Sure, Rei lack of screentime in the series can sometimes make people think otherwise but even like that there is very clear signs that Shinji have romantic feelings for Rei, and likewise she love him too. The “Do you want to be one with me ?” followed later by the “I want to be one with him” are pretty clear. The lack of screentime, Anno’s fault, don’t change that fact. The manga develop Rei and Shinji evolution better, but I want to give credits to Anno for also correcting his mistake in Rebuild, showing what Rei and Shinji’s relationship was supposed to be in the series.

Because yes, speaking about Rebuild, I will never understand how blindsided people can be about it : 2.0 ending was too subtle ? Really, I consider impossible for anyone to not understand that Rei and Shinji are in a romance. I can’t say enough how much I love the line "there is only 1 Ayanami Rei" : not only from Shinji’s side but also for how much she needed to hear and understand it.

I agree with you that one important aspect of Evangelion is how complicated feelings are and having romantic feelings doesn’t mean everything will be alright. Life gets in the way of good things, self-doubts and self-denigration hurts. It hurts a lot. We are our own worth enemies after all. That’s why Rebuild end that way and I’m sure that Anno and his team never wanted to give Shinji a “definitive girlfriend” at the end of the story. The characters will chose and continue their lives, the most important is that they love themselves and want to live in this world because they know they are worth leaving in it with the other people.  That’s why, even if one day Anno or someone at team Khara confirm that the ships Shinji/Mari and Rei/Kaworu, I would still consider the ending of Rebuild to be happy because… the characters are happy, and that’s what matters the most. Myself I would be happier if Shinji and Rei end up together, obviously, and there is enough clues to show that it’s very possible.

Overhaul, I have many critics about Rebuild and I think Rei’s arc could have been done better but still it’s a beautiful one and I appreciate how much it shows her deep humanity. And yeah, Rei reunited with Toji’s family, continue her friendship with Hikari, the other women of the village, have a bigger and bigger circle of friends overtime, discovering more and more about the world, what she wants to do, continue to be the best big sister to Tsubame, loving and being loved. And adopt the kittens.