@Kaiszen, I’m so happy to see you have detailed what you have done.
I too have been throwing money at this situation. I have upgraded my internet from 100 Mbps to 940 Mbps download. I know upload is most important, and that moved my upload to 10 Mbps to 20 Mbps, to finally 35 Mbps. So I thought that moving it to 35 would solve the problem… NOPE, same exact problem.
I have upgraded my wifi by completely changing my wifi infrastructure, and now I’m using WIFI6 with mesh extenders - still no luck. I have many of my cameras wired for power, and some are very close to the router, yet still no luck.
Seeing your setup, and you having the same problems, I think I may just give up on RING and switch to Ubiquiti or something. I just can’t stand the fact that I continue to have choppy video that never seems to stop. I can’t rely on this for security.