I can’t tell you why, but I get the exact same thing with my anxiety, and it saps my focus and motivation.

I think I saw a post on reddit along the lines of “anything worth doing is worth doing poorly”, for example doing a poor job brushing your teeth is better than not brushing them at all. It’s different than half assing something because you still care, you’re just doing what you can do.

I’ve kind of adopted that philosophy because it’s better to go to work and be 20% productive than not go and be zero percent and then worry about making up for lost time.