Curate, connect, and discover
It's mentioned that in every timeline Sayaka contracts and becomes a magical girl, she becomes Oktavia.
I think this says a lot about Sayaka's mental state. Even if Hitomi doesn't confess to Kyousuke, even if Sayaka and Kyousuke were to date, Sayaka would still become Oktavia.
Maybe it's a case of regretting what she wished for, or falling out of love with Kyousuke, or that her relationship with Kyousuke didn't work out how she had wanted it to. Regardless, something always goes wrong when she makes her wish; and I find that very fascinating.