I have been experiencing this same exact issue over the last several months in Mesa, AZ. I have had 5 techs come out and they did various things but still the issue persists.
All the traceroutes I run are garbage and show incredibly high spikes on local cox nodes. Problem also tends to get worse around 5pm AZ time.
It is impacting work for me and my wife and there does not seem to be any solution in sight. Gaming is nearly impossible with the high packet loss all day long. I don't know what else to do at this point.
The entire reason I went to the forums is to hopefully get more eyes on the problem. I'm convinced at this point that it's systemic, and it's clear that Arizona is a market that's simply won for Cox. There are "competitors" as long as you want to go through middlemen or deal with DSL (in 2021?), so the competition is a joke.
I'm probably going to start asking around the neighborhood to see if people have noticed the same thing. I assume they have, but don't realize what's causing it. My plan from there is to organize folks into asking Cox to finally fix their infrastructure here, and if that doesn't work, going through the FCC for an informal complaint, and if even THAT doesn't work, probably contacting the EFF to help file a formal complaint
