I Imagine there was also a share "Best girl was robbed and was a way better character than Main Girl"
I'd believe this but:AFAIK it's an entire sub-genre of otome games, not one game or game series in particular. If there was a Dragon Quest sized monolith shaping things I think I'd have heard of it. Instead I suspect these otome games are like the American romance novel sub-genre where the tropes are heavily codified and repeated. Which is why there are so many amateur authors saying, "Wait a minute, are these heroines breaking up engagements really that good, and for that matter don't the villains get too raw a deal for what are honestly pretty minor crimes?"
Oh, sure, but I have yet to encounter an expert on Otome Romance Video Games to do that for me. It's hard enough to pick up stray nuggets of cultural info, like "Alice in Wonderland is very popular and widely known in Japan" or "The age of consent is lowered in a 'sincere romantic relationship' that's been parentally approved, which is why teenage couples are always so flustered when the boy meets the girl's mother and she makes a show of saying she approves of him dating her daughter." If you know of any English language source talking about the Otome game genre with any degree of real knowledge, please share with us.Even in a memetic slurry like that I'm pretty sure an expert can trace lines of evolution.
Good news, there's a PV out now so it's pretty much confirmed.