Internet bottlenecked and getting less speeds than paid for and 5 days with inconsistent speeds and constant disconnects no working solution and no credits offered for failure to provide service. Multiples times each month.

I hate to mention this, but if you're getting 90 down with a wired computer, ensure it setup for 1000basetx, and not 100basetx, the 90 down indicates the ethernet running at 100 mbps, most of the time. 

The ethernet settings were the defaults. There was a days long “we are working to deliver a more consistent internet experience in your area” last week, and this started up at that point. I switched it to 2500 and 1000 and restarted both times but neither made a difference.

The down speed is randomly stuck in the 90s for periods of time. I had consistent 1000+ down before last week, but my upload was 0-4 most of the day, now both are poop. My jitter is often close to 30, I have high latency and packet-loss on all hops to anywhere, so I’m thinking I may have an ingress problem.

It happens on wireless devices as well, it just decides I don’t need anymore speed. The gateway is like 2.5 weeks old.

If it's on wireless devices as well, then yeah, you should talk to Cox Tech support has see about having someone come out and see what's going on. A few things to do first, ensure all your cables have good connections, unscrew, screw them all back in, make sure nothing loose on splitters, and if you have connections not being used, disconnect them. With your ethernet device, make sure the cable is a Cat 5E, or cat 6, or better. If it's a cat 5, it could cause some of what you are seeing,  dropping down to 100baseTX now and then, due to crosstalk/interference. 

hmm, reply did not post for whatever reason. 👀

I only have internet service, so it’s just loose rg11 from tap to side of house, no splitters, no wall plate. a new drop was ran last month, only the end cable that actually goes thru the wall was kept. I’m using the Ethernet cable provided in the gateway box.

Tech Support and Executive Escalations seem to want to fix the issues, but the Maintenance Team here obviously doesn’t care after 4 and a half months of senior, business and escalation techs advising on next steps, and Maintenance themselves seeing and documenting problems, but not acting on them, or trying to fix.