From their roadmap page: "We will spend more time on macOS. Even though Apple’s support for the technologies Krita needs, like OpenGL, sucks."
And Krita shouldn't be more unstable on macOS than on Windows or Linux, but it doesn't get tested as well, and there are so few macOS developers who want to take a hand. Personally, I develop on Linux but use Krita on Windows, when I find time to work on my own comic. The macbook pro only gets opened to make builds or fix the occasional macOS-specific bug.
You ARE NOT the stupid one. The Krita UI/UX is stupid.
Even the simplest of tasks becomes a complete hassle. I want to love Krita too, BELIEVE ME I WANT TO GET RID OF ADOBE, but not at the cost of adding hours to my workflow.
Example: Today I wanted to delete some text on an image and add new text. This stupidity cost me an hour before I caught myself....
"NO! Just STOP, you do not have time for this shit!"
...I held my nose, opened adobe and got it done in 5 minutes.
M'kay?! Enough Said, I have no time for the fools who will no doubt defend this madness.