The GOP was maybe mad, but more importantly to me the people who actually study voting systems for a living were "mad", and the people who hurt their favored candidate by voting for them were likely upset.

Ignoring that the outcome was maybe what I would have wanted, it is definitely pathological that you can hurt a candidate by voting for them. Quoting the Wikipedia:

The election was also a negative voting weight event, where a voter's ballot has the opposite of its intended effect (e.g. a candidate being disqualified for having "too many votes"). In this race, Begich lost as a result of 5,200 ballots ranking him ahead of Peltola; Peltola also would have lost if she had received more support from Palin voters.

What do you find wrong with those other systems? RCV is also not "one person one vote". Approval voting is used in the UN and neither seem to have some of the pathologies of RCV.

Bit of a late edit here, but isn't "one person one vote" basically the description of our current problem with voting? All of these systems are trying to solve that issue.