Gimp isn't perfect. But neither is Photoshop. In fact Lightroom users grizzle that Photoshop is so much harder to use than Lightroom. It's a different animal.
I use Pinta or Paint.Net when I want a quick edit. But Gimp has the tools for serious editing. More tools, more hard to use.
Some Gimp things, yes! should be improved. And other things are being improved as we speak. And some things can be done on a photo much easier in Inkscape.
I hope the whiners donated to Gimp development? No? Then just please step back, and think for a bit. If thinking is too hard, then just take a deep breath.