Having worked on teams in the past that have run national elections (Angola and Bosnia), it is a thankless task and even if you run it 100% correctly, somebody will always claim there was unfair play. The boxes are sealed, the counts carried out before official witnesses, nobody allowed in or out, once the counting has started.
In Angola, we had to ask the government to stop listening in on the phone lines, because it broke our internet connection (their kit was so old, it made a loud click every time it switched in, causing the modem to drop the line). After the election, the rebels, who lost, claimed the election was corrupt and our team were evacuated laying in the back of Toyota Landcruisers and Land Rover Defenders, with the security guards having a running gun battle with the rebels to the airport!
(Luckily, I was only providing IT support back at head office in the UK.)
Given all the hard work involved and that with hand-counted re-voting, the results haven’t changed, I would say the US situation went off very mildly in comparison. I would think a big round of applause should go to all involved in counting the votes for putting their lives at risk during this time of COVID, to ensure that the election went off without any major fraud.
Where I live, in Germany, it seems to still be all-paper ballots.
Voting machines are a problem, in that they are not openly tested and certified by an independent body - and when such things are tried, Siebold and Co. try and get the machines confiscated or sue for supression of the results, but the new open-standard should change things, going forward.