I just upgraded to macOS Ventura and now my external monitor (BenQ PD2700U, 27" 4K monitor) is all screwed up. The resolution is very tiny. The scaling option is no longer in Settings > Display. You can only switch between "1920x1080 (Default)" which looks enormous, unclear, and awful, or this tiny "3840x2160 (low resolution)" that looks clear but is nearly illegible it's so tiny. I've downloaded all kinds of apps trying to fix this to no avail. I never had this problem with the exact setup in Mojave. Any suggestions?
As mentioned in the comments, it seems like a Ventura bug.
When I was in the Beta, I used this tool to select resolutions that the OS didn't provide https://github.com/waydabber/BetterDisplay