Oh, it was that Nick Clegg. The one who destroyed the Lib-Dem party by voting the Tory party into power, without getting anything meaningful in return. I thought perhaps the name was a coincidence.
Given that the referendum failed by a 2:1 margin, I don't think he'd have been any more popular even if they had gotten their alternative voting system.
Maybe it's one of those things that voters would have liked once they had experience with it, but if Clegg thought it was something voters were clamoring for, he was very wrong.
Clegg's mistake was agreeing to "alternative vote" being an option instead of a proper system of proportional representation which would have made a victory like Johnson's in late 2019 near impossible (though not impossible, as the Scottish system _designed_ to keep the SNP out of power showed).
In terms of moderating an otherwise horrific bunch of people (see every action since 2015), Clegg and the Liberal Democrats did a reasonable job.
Do not read this as a defence of his employment at Facebook, where he has shown himself to be for sale to the highest bidder at any available opportunity.