I appreciate your info about RSD and your anecdotes. :)

I felt like an absolute idiot, especially because I recognised that logically, further procrastinating made absolutely no sense at all

It is not a moral failing to be driven by our emotions, It is a part of what being human is.

We all pretty much have this assumption that our logical reasonable thoughts are what causes us to make our decisions. It is a wrong assumption. Our feeling emotion brain is usually what causes us to take action. We are moved to action by our emotions and our feeling brain. And then our logical thinking brain comes up with a reason (justification) for our actions.