It takes a while getting used to anything. Gimp does have a Photoshop keyboard shortcut preset, to ease you into it.

And gimp does have some parts that are better. For example importing a bunch of images and lining them up on a spritesheet is both faster and easier on Gimp. And both Photoshop and gimp have scripts to do this, but I was never able to get the Photoshop script to work.