Why is everyone saying they aren't good? What are you comparing yourself to? There are so many types of skiing and you don't have to do a double cork to be considered "good".
I'm still working on my 7, 4's out of rails, and other stuff in the park so am I "good"? no... but skiing is my love and it's what I'm best at. I strive to be the best all around skier, wether it's downhill, trees, bumps, groomers, cliffs, backcountry or park, I love it all and I want to ski everything on the mountain.
Don't try to compare yourself to the pros like Wallisch, there's more to skiing than just park. If you can shred a zipper line or send it big off a cliff, your good at skiing in my book.. Just have fun and try to progress at whatever feels most natural.