girl... you're tripping yuri flags all on your own now, but it's not the good ones! It's the ones that forces you on (un)requited love route that never ENDS.
Wasn't she trying to find out Tiara's favorability towards the various love interests so they could determine what route they were on??
Story could have let MC find out Tiara's favorability towards her before breaking, and then have MC realize just how fkn pointless all that was to begin with since it still didn't give her any useful info regarding what route they're on.