Spectrum Gig Internet Problem with CM1200

So, this is where I am at now. I had the guys that installed my home theater wiring handle everything from where the drop attaches to the house. I bought bulk, quad-shieled Media Bridge cable and Belden ends. I helped them pull all of my old interior cabling, and we began a square one. I bought a new ground block for the back of the house, because as we know, Spectrum cuts corners. Supply coming into the house goes 2 ways, one solid, uncut, unmolested cable straight to the modem, the other side goes to a 1 in, 3 out to my boxes. All of the ethernet in my house is cat8, because I am Captain Overkill. All of my networking equipment is less than a year old now, and the 2 main pieces, the modem and router, are less than 2 months old. Despite all of this, and spending the money on cable, ends, ground block, labor, etc., SSDD. Spectrum has been aware of either a plant, node, or both, issue for quite some time. Their network field services team, is obviously crap, and does not care or know how to fix the problem, in a month and 6 days. Internet is still intermittent, I still have to power cycle equipment (not every day, but still), speed tests are all over (as low as 19Mbps to 812Mbps download), never near the 940Mbps, that I pay for, whether it is wired or wireless. In many cases, I actually have faster speeds over Wi-Fi, and in others, it is negligible, only +/- 50 Mbps difference. 812Mbps is the absolute highest speed ever achieved, and was the anomaly. The Spectrum business class, internet supervisor was sent out to my home, with another tech. The sup thought he was Einstein, and that the issues absolutely must be my equipment, so he brought with him, one of their modem/router combos, and a laptop running Win7, both of which, he "tested back at the office and are capable of gig speeds". Well, guess what? Three hours later after disconnecting and reconnecting their stuff and my stuff, surprise, surprise, it made ZERO difference.

I have been saying since September 8th, 2020, that the problem was outside of the house, and no one, not anyone on the phone, chat, or techs, were willing to listen. So, after all my time and money wasted, I am still at the mercy of the complete tools Spectrum has working out in the field.

At least I know it's not my modem, or any of my equipment. It's just too bad all of the time and money spent, just to clarify what I already knew.