Her complaint is because of "how fast I gave in" and "how that makes me look". She hates it because it makes her look desperate, not because she was the first as she usually isn't.
Gonna reply to both of these in one with something that backs up Moonflare's point.
Maya quite early on talks about how when she attempts to speak to Ami about the resets she simply "gets angry" and "demands they talk about something else".
This isn't how it works for anyone else who isn't in the know to some extent, they instead repeat the last line of dialogue or a diversion line.
Not to mention that, again, Ami / Sekai can be seen cropped in one of the rooftop apocalypse scenes hiding behind a wall. Stature wise it looks like Ami wearing her mother's dress. (Im unsure if you see this during bad uncle playthroughs).
Personally, no. I genuinely like this game, the story, and most of all the characters; I want to see how it ends, where it goes, and what happens to all the girls.
I've "quit" a few times due to being unable to handle the more horrific scenes, originally during the cruxifictions of Maya, then again after the Molly incident.
I can stomach it now, wish I didn't have to but it is integral to the plot a lot of the time, where-as usually the stories that have such events are not.