The problem with the Resistance is basically the result of editing. They were initially designed to be scrappy because the NR wasn’t supporting them, but once you cut out all the scenes where this is explored, essentially you’re left with the question - well, couldn’t they have just made them the New Republic, and they just become scrappy once the senate and fleet are wiped out? It’s a simpler explanation and easier to understand in a fast-paced 2 hour movie, so that’s what they went with. Problem is, even though the crawl suggests as much, at the end of the day the Resistance was not designed that way, and the expanded canon and really the film itself doesn’t support that reframing, so it’s just a little confusing. I wouldn’t say it’s terribly detrimental to the film, but it’s messy.