Poor picture/sound on major networks

On the 4 majors, CBS , NBC , ABC and Fox have periods where the picture is totally pixeled crazy and unwatchable. I worked with your bot system 3 weeks ago. They notified me they were working on my system and it may be down till 3PM. Whatever they did they fixed it. Then Sunday, the football feeds on Fox and CBS were terrible ( It’s hard enough watching the Browns , even when the picture is good ). I’ve rebooted this system until I’m completely out of boots! I’ve checked cables countlessly. There’s something in my feed. And naturally it you come here to look at my picture it’s not going to do it for you. It’s almost like throttling at busy times like internet used to be . Help !!