I think it's a huge overstatemen to say that all the picture that make you say 'wow' have been pp'd. Certainly some of them have, and I would agree that most have basic fixes. But to assume that a pictures wowness is based on PP, is a bit much for me.
OP, I think you answer is that you pictures are very static, and because the subjects are pretty boring. I did the same thing for a long time. The biggest thing to learn is the difference between what looks cool in person, and what looks good in a picture; and there's a huge margin between the two. It's pretty hard to take a great landscape picture of a boring landscape. Regardless of how cool that gorge looks in person, in a picture, it's a small piece of blown out sky, then the same colors and textures for the rest of the frame. A lot of it just comes down to the times and days that you go out. But the biggest thing, is to remove your personal attachment to an image/location, and ask yourself, 'would this look good to someone who wasn't here?' I find, like you did, that more often than not, the answer is 'no'. Keep at it, it can be frustrating.