...?
People, it's a pokemon game. The only way you can get a 'forced het route' is if you accidentally pick the male protagonist and are magically unable to re-pick, then for some reason decide to willfully interpret every scene with Lillie in a romantic way. You could also squint really hard and purposely interpret every interaction with any semi-significant male character as romantic.
There you go, you put yourself into a position where you can somehow call it a (self-imposed) forced het route.
I never said it had a het romance it was a question and a guess - I know nothing of the game - but it seemed a reasonable guess as to why a yuri fan might stop playing it.
^I have no problem with the guess at all, just thought it was quite a jump considering this is a pokemon game and these kinds of games don't have explicit romance let alone a route.