Even Russia’s “hypersonic” missiles are shot down by plain ol’ patriot systems on the regular.

This is untrue. Patriot systems have only downed missiles that travel at hypersonic but slow down in final approach (Kinzhal). The US military recognized that these are not "true hypersonics" because of this. The Zircon missile has only been used 5 times in Ukraine, none of have been shot down. It is currently considered the fastest missile in the world with no known defense.

And even with that, the Kinzhal has been incredibly effective, as you can easily see based on the fact that Russia is hitting strategic targets in Western Ukraine including the capital.