Just personal experience, I guess. Photoshop felt really easy to learn and I never had any issues finding a tool that suited my needs. What I'm saying is that it's less intuitive, not that it sucks or anything lol. Neither program ever failed to do anything I needed it to, I just found myself having to use Google a lot more with Krita.

I also remember having some issues with transparency and saving a file for a crosshair in Half-Life, and that was the only major headache I had with it. There's a lot of terms and options I didn't understand, and I didn't know what to change to make it save the file as it was when I loaded it. But back when I still had Photoshop, it just worked without futzing with any settings.