packet loss 80%

Every time it rains, I deal with packet loss that can reach up to 85%, and even today, with sunny skies, it’s still at 9%. I’ve had techs come out, replaced costly equipment, and called tech support, but the only solution they offer is to send another tech. Doesn’t Xfinity monitor its own nodes and systems for packet loss? Why do I have to be the one informing them that their network isn’t working?