Damn man, you’re my hero. I googled everything but nothing worked or some options were out of the question. I finally found your thread, and now my Rog Strix G513 WiFi6 connected to a 5Ghz network is running a stable 3ms from 2 rooms away. Before this it was jumping from 1ms <1ms 120ms 240ms 130ms 4ms, you get it. It was driving me NUTS. It happened out of no where, seemingly after I uninstalled McAfee Web Advisor. The laptop is 4 days young and worked fine the first 2 1/2 days. Once I started removing and disabling nonsense that is absolutely not needed (like McAfee, automatic Spotify, Windows Teams), my ping to the router started going haywire.
You’re a blessing. Thank you. You should revive this information. It is widely unavailable.