Nighthawk Mesh Router Can't Connect to Netflix, AppleTV or Prime

Netgear Nighthawk Whole Home Mesh WiFi 6 System, 3-Pack (MK63-100NAS)

I unfortunately this brand new (2021) wifi 6 Nighthawk router. I bought it because I have a four-story house with a TV and a Peloton on the top floor and TV's on the other three. My CenturyLink fiber optic works great, and on the 2nd and 3rd floors, I have no problem connecting to anything. The first and top floors are too far away from the CenturyLink modem/wifi router, so the signlal keeps having to buffer. I bought this $200 router with two satelites to fix this issue. 

I can connect my computers and phones to the Netgear router and they work fine. The Peloton on the fourth floor connects just fine to the Netgear router. While all four TV's show that the Netgear wifi is connected and there is internet, not one of them will load Netflix, AppleTV or Prime, although they load YouTube just fine. The TV's all connect to these apps just fine when they are on the CenturyLink connection, although it's too weak for two of the four floors. 

I have spent no less than 6 hours (honestly) with 10 or so Netgear technicians and not one of them can fix the issue. We've done everything from change all the DNS settings, to updating firmware to changing the CenturyLink modem to "bridge only mode". Netgear even sent me a brand new router which I tried to set up with them on the phone today. After another 1.5 hours, we are in exactly the same place. 

Netgear has to know about this issue because people are complaining on their on "Netgear Community"! Why don't they admit they don't know how to fix it and give people their money back? I'm trying to do just that and they are being a pain in the *ss. I will never buy another Netgear router. Never had this trouble with anyother brand before.