Severe packet loss and connection drops every night

I have been experiencing severe packet loss every night for the past 4 months now. My connection is stable for the rest of the day, but around 8PM-1AM, there will be severe packet loss and connection drops for 2-4 hours. The time that packet loss/drops start to happen is random, but the consistent thing is that it happens every single night.

I have had 3 techs out already, and they confirm that my hardware/cabling is fine. I've upgraded my internet speed to determine if that was the issue, and nothing changed. At first I thought it might have been an issue with my hardware, but after every fix I could find, nothing improved. After further research, signs point to an issue outside of my home as the connection is 100% stable for most of the day, and at night it goes to 10-30% packet loss with connection drops.

I'm unsure of what to do at this point, I was given the contact information of the supervisor for my area by one of the techs, and he has stopped replying to my messages regarding this issue.

Modem stats during packet loss: https://imgur.com/a/pgTuqlp

Modem model: TP-LINK TC-7610

An example of a traceroute during packet loss: https://imgur.com/a/coTJDey