Great Download Speeds, Horrible Upload speeds

It's because of congestion, they are so far over the threshold of customers that there isn't enough throughput to go around. Plain and simple over selling. Who ever does the backlog in your area is also probably horribly congested. We used to get 20+mbps upload consistently, now we rarely go higher than 3mbps upload, while the whole time the DL is 200-350mbps. When your upload is that low, it only takes one device on the network to completely kill the connection. High download means absolutely NOTHING if there is no throughput to upload, essentially throttling your entire connection because of low upload. Mind you we can look at the tower out our back window and its maybe 100-150yds from the house, rural area, our problem out here isn't congestion on the towers, its the company they pay to take care of the backlog in the area and that company is AT&T, the reason is because AT&T own ALL of the actual cabling that is underground and run on "telephone" poles.