I am a very irregular user, but last few times I checked there were much better options to Gimp for people like me. Photopea is where I turn to, but I think there are others. Works from the browser, functions similarly enough that you can find help and tutorials very easily, pretty light.
I’m sure it’s different for heavier users, but a lot of the really heavy users will probably prefer the paid tool anyway, as their use makes the price tag less of an issue. So the target for something like gimp might just have dwindled into something too small to get the momentum back. No?
Why not turn to the high seas? If you own the DVDs, there’s no moral reason not to and you’ll save yourself lots of effort.
Plus I don’t think ripping DVDs is any more legal than downloading a copy.