I'm getting a bit -- no, make that thoroughly -- pissed off with people calling Linux on the desktop a failure. It's not a failure, it's a huge, huge success, especially if you look at the enormous obstacles that we had to overcome, and that we have overcome. And there's still plenty to do, and that work is being done.
Linux is used by millions of people every day, in many different situations for many different purposes. They, too, _just_ get work done. Whether they are working on GI Joe, coding a web application or writing a paper for school or university. Or they are facebooking, which means they don't get work done, but if that's what they want to waste their time on, fine. Get a linux laptop from a vendor like Hettes (http://hettes.nl/), boot it up and start work.
Every platform has its shitty corners, but at least on Linux, we're working all the time to fix them. Gimp might not work as a photoshop replacement for you, but there are plenty of artists who earn their money working on Linux with Gimp, MyPaint and Krita. Heck, these tools are apparently attractive enough that Windows users clamour for them and that OSX users are really pissed off with me for not providing them with a Krita build.