Krita is great for drawing, but it's no photo editor. It probably shouldn't be, either, that's more GIMP's space.
In my experience, Paint.NET walks a very fine line between "more complex than MS Paint" and "GIMP/Photoshop/Photopea levels of complexity". Great for altering screenshots and applying filters, but not as overwhelming as a dedicated artist's tool.
I'd say Pinta serves a purpose very similar to Paint.NET on Linux. It's it quite as polished as Paint.NET is, but it's still a good balance when KolourPaint is too simple and when GIMP is overkill.
I don't know about the Mac version but I find the Linux version a bit on the slow side and the interface look and feel is a bit off to me but I chalk it up to "that's because I am not used to it and I have decades of light photoshop usage ingrained in my brain".
But don't get me wrong. Krita is awesome and it's a better substitution to Photoshop than Gimp is.
In my experience, Paint.NET walks a very fine line between "more complex than MS Paint" and "GIMP/Photoshop/Photopea levels of complexity". Great for altering screenshots and applying filters, but not as overwhelming as a dedicated artist's tool.
I'd say Pinta serves a purpose very similar to Paint.NET on Linux. It's it quite as polished as Paint.NET is, but it's still a good balance when KolourPaint is too simple and when GIMP is overkill.