'insidious authoritarianism' is a curious way of describing two not-unreasonable proposals that are presumably aimed at making american democracy more representative and accessible...
You must have missed the part where they referred to human beings who they disagree with as "a rot in our system". The fact that you're apparently blind to such toxic rhetoric isn't surprising--it is increasingly common among progressives.
It’s not the voting humans who are labeled as the rot, it’s the cycles that result from the exercise of that bloc’s outsized voting power—as said in the second part of your quoted excerpt: “… that way they are voting is causing problems.”
I’m not suggesting the original wording was great and non-toxic, but I don’t think the poster said what you interpreted them as saying.