I experienced this last year as well. It was very difficult and unpleasant. What ultimately worked for me was taking significant time off, changing jobs, and mo

I experienced this last year as well. It was very difficult and unpleasant. What ultimately worked for me was taking significant time off, changing jobs, and moving to a new city. I also started reading some books like Atomic Habits which gave me some insights into how to short-circuit some destructive feedback loops I was participating in. I'm not entirely back to normal but I'm having fun at my job again and have much better rhythms now.