Netgear CM1200 issues on Comcast Network

I have experienced streaming network problems for the past year, weather the device is connected via ethernet or wireless. After spending 3 weeks trouble shooting with the wifi device manufactures (Samsung and Yamaha), the wifi6 mesh router manufacturer (ASUS), the cable modem manufacture (Netgear) and my ISP (Comcast) I was able to definitively confirm there was one major problem causing the network problem, my Netgear Nighthawk CM1200 cable modem. I replaced it with a Mototola MB8611 cable modem and my network streaming problem were immediately solved. I am enrolled in a 1 GBPS internet speed plan with Comcast. Internet download speed tests from several online speed sites resulted in consistent results of only 37 Mbps. After replacing the Netgear CM1200 with a Motorola MB8611 cable modem, my internet download speeds increased to 650 Mbps, only an 18 fold increase. My network streaming issues (via ethernet or wireless) have now been completely resolved. According to Comcast, the filters on the CM1200 are the issue. Netgear should recall this modem or at a minimum issue a firmware update to try to resolve the problem. Netgear has never issued a firmware update for the CM1200. When I asked Netgear Technical Support for the latest firmware, they said that the ISP is the only one who could do that. That statement is completely false. The modem manufacturer is responsible for firmware updates and the ISP is responsible for boot driver updates, these are completely different software updates for cable modems. After what Netgear just put me through, I will never purchase another  Netgear product from them ever again.  

John Fricke