I don't think its because of being different to photoshop. I tried Gimp many times during the last maybe 15 years. The UI used to be so chaotic I could not find my way around. If I tried very hard, I was basically able to do everything I needed, but with so much effort. Years ago the UI was just bunch of floating toolbars on the desktop without the possibility (or at least I couldn't find a way at that time) to have a common backdrop. All the little settings and modals were just so hard to use it was very frustrating. I had the very same experience with Inkscape over the years. I want to like those project so much, I know a lot of effort is going into that, but it didn't work for me. Same experience was with blender before the big redesign. Now blender is simply awesome and pleasant to use. I hope for such transformation for Gimp and Inkscape. (and Audacity)