>>5763>She achieved the goal she set for herself(become strong), and kept her promise to Madoka(stop her from being tricked by QB).
Her goal wasn't to become strong. She isn't a shounen battle anime character. Her goal was to protect Madoka, which she never managed to do. As for Madoka being tricked by Kyubey, it's pretty clear that Homura doesn't look at it the way you do. Madoka had the potential to do almost anything. Kyubey got her to erase herself from the world and leave his system mostly intact. That's tricked enough.
>didn't think the ending was that sad
Urobuchi has also said that Rebellion has a happy end, at least for Homura. Such comments have to be understood in context.
>Doesn't seem purposeless to me at all.
It doesn't matter if it has other purposes. It lacks the one purpose that matters most to Homura.>>5765>Doesn't seem unreasonable to me. Continuing only makes it worse, and only hurts Madoka.
And what does not continuing do? Just because one option is bad doesn't mean that the alternative is better. In this case, the alternative is worse. The expected outcome of leaving the situation as it is, based on all the previous timelines of experience, is that Madoka will soon die or become a witch. For Homura, that is the complete, permanent failure state which must be avoided at all costs.
>only if you assume it's still possible to save Madoka
Homura has no choice but to continue believing that it's possible, because not doing so means that she will become a witch herself. That means adding another witch with unknown capabilities to the already bad situation. She knows all of this.