I do have a similar reaction. If everyone's cloning it and my eye lands on it over and over, I don't want it. Or, if it's a perfect-for-me item I may grab it while it's available and plan to wear it when everyone else is over it and even more time has passed--which isn't as long as it used to be. That's not Team Wear, but a reaction to droughts in things that do suit me.
This fatigue has to be tied to the fashion cycle that gets faster and faster. We're all online looking at blogs and Pinterest and Instagram and the like, and browsing online stores to see what's new, clicking on links and sake notices, seeing fashion ads everywhere in our browsers thanks to cookies and adware, putting our wardrobes into electronic visual formats and playing with them, plus some people are watching it on TV and online vids frequently.
Our eyes never rest from fashion now. We may see more fashion on a slow day than kids see instances of violence on tv, movies and games. Its no wonder trends get huge, blow up and die like overnight supernovas. Everyone sees it, tries it, watches everyone else try it, and gets retina burn from all the repetition before the tags come off the latest purchase.
We don't wait for monthly fashion magazines to see what's hot any more. In a month we may have seen so much of the latest big thing we never want to see it again.
In the olden days it was the biannual fashion show cycle supported by monthly fashion spreads. It didn't wear us out so fast.
I've been picking up pieces in the popular wine colors because it is my radiant color and I adore it. But because I'm seeing it everywhere I'm now sick of looking at it in pictures, stores, and my closet, and the fall season it's meant for isn't even near (for me). Argh. But if I wasn't looking at fashion so much now than years ago, just picking up a magazine or noticing a store window here and there, the color would still feel fresh and beckoning.