>You think governments have the ability to combat misinformation without living in some Orwellian-esque regime
yes. Of course it can and has been abused, but if we use that line of thinking we'd have zero government.
>If we could even start by labeling misinformation properly, then maybe we could do something about it.
I agree. It's very case by case, but I'd hope in this case that "flooded with fake images [about war]", i.e. propaganda, is at least one of these cases where you do want governments (emphasis on plural)to intervene. Especially as AI will only hasten the ability to generate such propaganda.
>"Misinformation" hardly fits into that in its current state.
misinformation fit into all 3 aspects you mention, though. misinformation has harmed people, regardless of your political spectrum we should be able to agree with this. And the ability to process the proper facts does keep things fair over who has the "hottest memes" or exploits SEO the best for their goals.