There are a lot of questions here...
Linux has games, and you can also run some games with WINE. You'll need to take those one at a time. (More on WINE in a moment)
Linux has equivalents for almost everything in Windows---eg Photoshop-->GIMP. Also, things like Photoshop will also run on WINE.
If you have trouble with WINE, you can also try CrossOver-- http://codeweavers.com
Regardless, you'll need to tell us the exact problems you are having.
Finally, please clarify your current configuration---eg is it true dual-boot, or still WUBI? What do you mean by "I can't go back"?
I don't know much about WUBI, but I would personally set up a true dual-boot.