My issue is with JRPGs wasting my damn time. You have to commit 50+ hours for the game to maybe get better? It's the one genre, along with open-world games, in which I can't just play unless I know the game is going to be worth it. I don't have that much time to waste anymore.
I understand where this sentiment comes from, but I also feel like it is just an incredibly misguided mindset to have with RPGs on the whole. You will typically know if a game will be to your liking within the first 2-3 hours at most. Either the early combat concepts, story setup and characters grab you or they don't. If anyone said this sort of thing about a novel it would be laughable.
If the opening hours of Persona 4 establishing its setting, most of its main cast and its core mechanics don't do it for you, then you already know the rest of the game isn't for you. If by the time you're about to crossdress FF7 just hasn't piqued your interest then it just isn't gonna be for you. Yes sometimes games will open up or change as they progress and you might like to see it through, but if the story, characters or gameplay aren't compelling you to keep going then why bother? Treat it like any other game you aren't vibing with and drop it. If I completed a couple levels of an FPS and wasn't having fun I'd just accept it isn't for me and move on.
It is true that some RPG climaxes are controversial, but even then, I think people who decide to hate a 20+ hour journey just because the last 3-5 or so hours disappointed them are being silly. It is rational, since the last thing we experience in a game will be what sticks with us, but as I've grown older I like to think I've gotten pretty good at keeping my vibes positive with a game even if I disliked the ending of a 40+ hour long JRPG.
The genre isn't for everyone and that's ok. Length can be daunting, but much like long-running franchises like One Piece I like to highlight that the journey is far more important than the destination. If you aren't enjoying the journey than don't take it, but don't let the length of the journey stop you from even trying to take the first step, especially if you think you'd enjoy the experience.