I've used all three, and the amount of searching from least to most goes Krita -> PS -> GIMP for me. PS was the first I used, but I still had to search things

I've used all three, and the amount of searching from least to most goes Krita -> PS -> GIMP for me. PS was the first I used, but I still had to search things for the entire time I used it. GIMP I just start by looking up how to do something, and Krita I just do it.