Sensory burnout, maybe?
I experienced the same thing around 2010, but I attribute most of it to what I experienced with my OCD. I do think though that technology played a small part, though. I noticed the people around becoming more and more sucked into their online lives. I remember back when MySpace was a big thing, people used to get upset when they weren’t listed in someone’s “top friends,” which was the one really sinister aspect of that platform. I mean, it’s kind of twisted to include a feature that makes you rank your friendships, and it made some people really insecure. Facebook I think has had a similar effect; I’ve literally witnessed someone close to me get emotional over not receiving very many “likes” on a very thoughtful post.
Then you have the online shopping craze. It’s kind of sad how people plan their Thanksgiving dinners around Amazon and Best Buy’s Black Friday sales. Perhaps you just started to see through the pointlessness of all that nonsense and lost patience with it, hence why you never felt the desire to go back to any of that stuff.
Much of the world is consumed with pointless endeavors that don’t lead to any kind of self-growth, relationship building, or anything else that’s even remotely meaningful. People now have this weird idea that “liking” someone’s Facebook post is an acceptable substitute for picking up the phone, calling that person, and having a real conversation with them about important things — politics, religion, love, and so forth. It’s understandable how living in this kind of world at this exact time would affect you emotionally and make you feel a little depressed.