So, the problem with all of these proposed replacement systems (such as IRV, for example) is that "democracy" is a meme. People, en masse, believe in these systems-as-written (for better or worse) - critically - even if that isn't how things actually work on the ground in the real world.

So many people believe that, for example, the stuff written on the paper currency of the United States is legally binding. (It's irrelevant whether it is or not - people believe it, because they hear, believe, repeat, and teach the meme.)

Representative government is the same way. There are much better systems, and anyone can easily think up a few of them. The problem is going from A to B, also known as "the tyranny of the installed base".

No proposed new form of government or representation is worth the paper it's printed on unless it comes with a viable migration path from the status quo.

Because democracy IS a meme