Internet is nigh unusable during peak hours

Gigabit Plus Internet Plan customer here. Since the very start of service, we have experienced slow speeds, high latency, and flat-out drops in service throughout the day, but MOST notably from 4 PM until the end of the day. We have had SEVERAL technicians out, replaced the wires in the house all the way down to the street. I have a Unifi system, and it's NOT the router. I cannot tell you how many times I have restarted the router as suggested by the support bot and people alike (how many HOURS have been wasted waiting for the system to come back online, for lack of a better term). Please, PLEASE, I am begging someone to do something. At this point, it's as if I am only receiving half of my service... Yes, I am trying to contact support as well, but really, this forum seems to be the only way to get someone actually to look at the larger problem. Off to restart the router for the umteenth time today...

(this is a daily occurance)