I grew up with a ranked voting system. It has effectively been a two party system regardless. I don't think people know how it works and just treat it like first past the post.

Proportionate representation seems like it's probably better. I think everyone should skip the intermediate steps and jump straight to approval voting.

If I really geek out on voting systems, the one I prefer the most is the River method, which is a ranked ballot but fixes some of the issues of Instant Runoff and allows equal ranking of multiple candidates.

Any ranked system has some issues yes. I forget which criteria it fails but they are all better than FPTP.

My issue with unranked approval voting is that IMO very few people have equal preference of lots of candidates. I think that it forces people to express themselves in a way that doesn't reflect their true preference, and that's a bad thing.

Yes, I think multimember districts with proportional representation makes the most sense.

For anyone interested, here is a site to visualize the River (and other) methods. https://votingmethods.net/cond/