I haven’t uses gimp since the time of Ubuntu CDs

I admit for the very limited things I do and only occasionally I use Paint.net Still in my mind Gimp is much more powerful?

It is powerful, but usability is as shit as it always has been. Except for specific use cases Krita is the way to go nowadays. Even if it’s focussed on digital painting, it has almost everything you need for digital editing as well, with a much more user friendly UX.

I think the main problem with GIMP is that it was made by developers with developers in mind, completely ignoring how digital artists work. Like it or not, everybody has to take pages from Photoshop (and co.) like how Affinity and Krita are doing, otherwise there's really no incentive to completely change your workflow.