HR Screenshots Jagged Edges Help!

No. I made a 10x high res screenshot and downsized that to 1920x1080.
If that doesn’t make for very crisp edges, then clearly the AA functionality in the high-res screenshot isn’t up to my standards.

Of course there’s a HUGE improvement doing the above when compared to taking a normal 1x high-res screenshot.
Or 2x, or 4x. It’s just mindboggling to me that even downscaling a 10x shot still manages to not be razor smooth.