Here's a fun game, it's called "google the person quoted". So I googled Mary Duty a bit. I found this (local, reliable, seemingly neutral publication):
McLennan County and Texas election officials are encouraging voters to review their ballot summaries before hitting the final “cast ballot” button on the Hart eSlate voting machines the county uses.
wacotrib.com
Duty said officials in both party offices are continuing to educate voters and are putting out calls for volunteers to serve at the polls.
Duty and Ker said
they have heard of minor matters at vote centers but nothing major.
“We want to have a nice happy election,” Duty said.
Or this one:
Voter participation in the 2020 election is off to a record-breaking start.
baylorlariat.com
Duty said. “As recently as two elections ago we were in this tiny little room, with six sorting machines, and now we’re in this gym. That’s the way it is across the district. We have sort of doubled the number of machines, and it seems to me people are making good use of those machines. People are really anxious to vote in this election.”
That does not sound to me like someone who would describe the recent changes as "kind of a nightmare" without more context of what she was talking about, but you're not getting that from The Guardian.