high uncorrectables, high latency

What you're experiencing sounds a lot like what I started experiencing around Summer of 2019. After 10 or so phone calls, speaking to level 1, level 2, network engineers, etc it finally got classified as my area has too many users on the node I'm on. Our area had a ton of new houses go up very quickly and Cox didn't really prepare for it. From Summer 2019 to October 2020 it was miserable and a ton of delays to "split the node" but it finally happened, the internet was fine for maybe 9 months? And it went back to the same old thing ever since. I was so exhausted convincing them it wasn't my home equipment nor my line that I haven't even bothered reaching back out. I would pay double the money for half the speed if it was stable. Jumping from 30 ping to 100 then 200 then 300 randomly throughout the night creates a real ** experience when playing online games. I wish you the best of luck, at least you were told pretty quickly that it might be a node issue as it took a few months, and a few techs to figure that out after a ton of suggesting and convincing.