I see I see... I am taking this and integrating it into my understanding. I think I finally figured out what's got my mind stuck on this.
A platonic relationship with an SC, left unattended, will eventually trend to 0/0. However, an antagonistic relationship with an SC, left unattended, will eventually trend to 0/-1, 0/-2, 0/-3, 0/-4... and something about that disparity, that the antagonistics keep liking you less and less while the platonics just fade into the background, is triggering me lol. (presumably you're not leaving the romantic SCs unattended lmao)
Or, could it be that platonic SCs are supposed to continue going down in favor, across the "0" line and into negative territory? That would change a lot... and goes into a different line of thinking I had at one point, that maybe Platonic and Antagonistic could exist on the same table, and just let the favor positivity/negativity determine whether they're antagonistic or not, rather than opting into a relationship transition? That would take some of the agency out of they players' hands though, if a platonic went sour on them and they wanted instead to have a chance to salvage that relationship. Fate is a lot easier to raise intentionally than Favor is...
You've entertained me on this topic far too much already lol feel free to ignore my ramblings.