I really like red flags and dark romance in otome games; In fact, characters of that style have even become my favorites. However, I have limits beyond which I no longer try to justify or understand them, and I simply think they're idiots:
-They start denigrating the protagonist.
- Infidelity. I will never tolerate infidelity in a bad ending. I accept that they might have a partner beforehand or that their personality makes them flirtatious, but infidelity? Never. This would be the only option I would never forgive under any circumstances.
-They use me for some personal gain.
-They decide to run away when push comes to shove.
- Their route becomes boring and undeveloped, which increases some of the previous limits.
There are many things I can justify, tolerate, forgive, understand, and understand, but at the same time, I have my limits.