I have another hypothesis that one of the issues with ADHD and mood regulation is that the "clock" in our brains are broken. This leaves us with an inability to understand that "episodes" have beginning, middles, and ends. While the episode is happening we tend to believe that it will never end. We can't see the end. This is part of what keeps us frozen. Why would we want to enter a task that will continue to feel overwhelming indefinitely. This is why pomodoro and other strategies that clearly define the end are so effective. It allows us to offboard the clock management part of it that is so difficult. It's clear when the end is.

I think this is actually a skill that we can learn on our own. I haven't fully fleshed this part out yet.