SLOW speeds and UCD invalid or channel unusable warnings

I honestly cannot wait until another Internet service arrives in my area (northeastern Colorado Spring). I am a techy and know how to set up networks. Our Internet has been miserable and I pay for 2000Gb! I bought new routers and still this constant slow down. I am NOT getting what I pay for. 

Xfinity, you will be kicked to the curb so fast when either Ting or Verizon Fios arrives. You excuses are dried up. I am not the only one complaining or have problems.  If I find out you have done something to my service in order to convince me to get YOUR expensive modem, this will NOT be the last you hear of me. Soon, you will not be the only game in town and you will lose customers like a severed artery loses blood.