>>341463445I know exactly how you feel OP, and the conclusion I came to is that it's likely the environment we live in. There's too much stimulus; not enough boredom and quiet time to think/reflect. There's never a dull moment, we're entertained all the time. We're on our phones in the bathroom. We're on our phones in bed. There's no reason to wonder about or imagine something because you can google it in 2.9 seconds.
A dopamine detox isn't a bad idea, but more than anything, try to stay off the internet for a while.