Has anyone experienced a fear of wasting time? so they are unable to do anything?

Yet the time passes anyway.

Have you been able to overcome this?

I face this. I have some kind of fomo. And fear that I'd lose another day, which I inevitably do. But bc of this I fear starting shows or movies or doing things for myself. I feel constantly responsible (as an eldest child).

And to be clear, i wouldn't say this is executive dysfunction necessarily. That's a whole other thing - where you feel so stuck you can't bring yourself to do everyday tasks.