It finally clicked for me that the reason was because I was constantly running that conveyor belt. Every second I had some downtime, I got my phone out and read a bit more social media. Not only did I keep stuffing more in, but I never set any time aside to process.
So I decided to break my social media phone habit. Moved Reddit, Facebook, and Twitter off my home screen. Trained myself than when I had a few minutes of boredom to just let myself be bored.
Oh my God, I can't tell you what a difference it made. I finally felt like I could manage my own mental load. Instead of constantly having all of this news that I didn't know what to conclude about, I could just work through my thoughts, sort it out in my head, and put it away.
Being bored is amazing. We should all do a lot more of it.
In my case, boredom. I normally fix that by reading books on my Kindle, but if I don't have it for some reason, the phone is a good substitute.