Maybe there's a reasonable explanation, but maybe the road to hell is lined with "benefit of the doubt".

Exactly. And the thing is, some fraction of the uncounted ballots probably are for completely unrelated reasons, and they rely on this for plausible deniability. But taken as a whole, I believe most of these cases are cases of deliberate lack of care, i.e., voter suppression.

The real question now is: so what? What are we going to do about it?

Edit: just to be clear, I don’t have an answer - this is just what I’ve been asking myself the last month