I believe there is (was?) a trial for Stadia Pro if you want to try it.
Having tried it myself, I don’t think you’re off point on anything you’ve said.
The latency is substantial (and I’m on Google Fiber) and my wi-fi caused regular hitches. Which could be my hardware, but it’s not like my hardware (Unifi gear) or situation (typical suburban environment) is odd.
Can't comment on Stadia, but my Unifi UDM and WiFi routers weren't good enough for reliable game streaming. Had to go wired. With Gigabit Fiber (Centurylink in my case) it works extremely well on several cloud game streaming services.
Having tried it myself, I don’t think you’re off point on anything you’ve said.
The latency is substantial (and I’m on Google Fiber) and my wi-fi caused regular hitches. Which could be my hardware, but it’s not like my hardware (Unifi gear) or situation (typical suburban environment) is odd.