This is just personal thought on the trolley problem and why Satou Konoha decided to be better off alone.
In my head, the trolley problema in this chapter is a depiction of sacrificing people and befriended people at the same time. Iana have to choose or she might lose both side of the railway. There might be a way to save both side but she cant think of how, bcs as previous chapter mentioned, she is lacking. But she still try to solve that problem despite all that flaws and i think thats something that cannot be blamed upon her, but should be appreciated instead.