It’s a such a small aspect of the film, I don’t really care that it’s confusing.
What do you mean, “small aspect?” The First Order vs Resistance conflict was the main story of the sequels, and it wasn’t handled well at all. If you want to reset the galactic situation to Brave Rebels vs Evil Empire, at least give a satisfying explanation.
That’s just the backdrop for the story, not the story itself.
The backdrop for the story is necessary to tell the story. If the backdrop makes no sense, the whole story falls apart.