I replaced Gimp with Krita. It is often said that Krita is made for digital painting rather than photo editing but I haven't missed any features so far.
It's the other way around. The widget library was built for Gimp, then took a life of its own. Note that Gimp still has not released a version ported to GTK 3 (but the port is done since last year, in the 3.0 branch), released 13 years ago. GTK 4 has been released 4 years ago.
From my experience Krita didn't feel much better than GIMP. Stuff like the eraser being hidden under brushes is just weird compared to my previous experience.
If you're doing digital painting, it's probably just what you're used to.
I disliked Krita until I spent a few weeks learning it. Once I found the "Krita way" of doing things, it was actually a much better experience than Photoshop offered for digital painting.
I'd recommend finding a YouTube video where an artist takes you through how they use Krita to see some of the workflow and most common shortcuts.
