> and they are wildly different
As someone from the "whole rest of the west", no, they're not different at all. Very minor details change, but the net outcome is the exact same and suffer from the exact same problems.
You can't escape the iron law of oligarchy.
> Democracies are good at crushing dissent?
They're not only good: they are the best. You don't need to curb dissent by violence if you discourage dissent by social manipulation. It's the cheapest and most effective tactic: keeping the populace docile.
If you manage to equate "democracy" (again, quotes intended) with democracy (lack of quotes intended), most of the work is already done.
"What are you, antidemocratic!?"
"Don't blame me - I voted for Kodos"
There's a reason my country's system trembled when the bipartisan system was challenged as new parties emerged... but it was curbed within two legislatures without a single shot fired and now we're back to an even stronger bipartisan representation. Quite the fine job, actually.
We even have a name for this: "the state's sewers". They're very effective. There's a reason the state's armed forces routinely infiltrate unions and other citizens participation platforms.