i have had similar experiences and i used to believe i was at fault for no longer caring/turning apathetic. that it had been a moral failing of mine. but the reality is my scope was quite narrow; i still had much to learn about behaviors i was simply predisposed to without questioning it...
this may be due to my affinity for VN format games in general though, i can’t exactly recall what made me pick otome specifically up in my early teens. perhaps accessibility? i remember my first otome being re:alistair but i was also playing katawa shoujo (eroge) alongside it
usually my favorites only, but if there is a true route that's protagonist centric after having completed all the other LI routes, i will push through if i really like the protagonist.