I honestly don't think that blender and gimp are complicated. It's all a matter of getting used to the environment. Even if I had the money, I wouldn't buy Photoshop.
Simply because I am used to the work flow of gimp and if I use Photoshop it takes me 10 minutes to find the function that I'm looking for - while it takes me less than a second in gimp to execute the shortcut.

There might be some things that are more complicated in blender, but like I've said before, you just have to get comfortable with the workflow and the application's functions.