Poor and unstable upload speeds

I'm largely in the same boat here. I have random periods of light or heavy packet loss. It used to be about 2%, now the past few days it's been 20% at times. They've come out and tested my line which has a strong signal. I've wired a laptop directly into the modem and it's shown the same packet loss (aka not any switch or router issue). I've tried to convince Cox support that there's an IP level issue inside their network as the packet loss starts at the next hop beyond my modem (their concentrator) but they just insist it's my modem or device.

Even with 20% packet loss, the downstream is okay, 600mbits out of 1gbit, but the upstream is abysmal at 1-2mbits.

I've also replaced my modem for the heck of it, no change. I have graphs for TCP connection times to my server in EC2, packet loss to my next hop, but nobody qualified enough to look at it within Cox. It's pretty sad.

Not to be that guy, but I know what I'm talking about (been doing this stuff for 30 years) and trying to get beyond tier 1 support seems pretty impossible. I don't want to waste more hours waiting through the same basic questions for them to tell me it's my gear. I just keep hoping that someone in Net Eng wakes up and figures out their issues.

(the spike of 100% loss was resetting my modem)