I was shocked as well, I think part of it was the misinformation before the election. Another part was a lot of people just hearing about other voting systems for the first time. The common response by most people is to just vote to maintain the status quo unless they hear about something and think it can be a good thing.
Personally, I think with Ranked Robin, STAR, or Score voting on the ballot people may be more receptive to one of these alternatives. There is much less likelihood of anyone invalidating their ballots under one of these other systems.
It was also during a big election year that these votes happened on, if it was on a midterm I am curious if Alternative Voting would have struggled so much.
First Past the Post in this case, which is the predominant voting method in 48 of the 50 US states; I’m not the OP for this specific post though lol. I was going for short and sweet for the original title. I was mostly hoping that the Winner Takes All part would clarify what FPTP is referring to, in the links I shared it talked more about what FPTP is.