On December 4th, Italy is voting on a constitutional amendment that would see the party getting the plurality of votes getting a huge boost in elected officials.

Effectively, this is reducing their PR structure and making it more FPTP.

So, obviously, there are those within Italy that feel their current system is providing a disservice to the citizens of the country.

In other words:  I wouldn't count o there being a "overwhelming majority" in support of PR.