Packet Loss issues

Hello,

I have been living in my apartment building for almost 2 years now and I have been having horrible and inconsistent packet loss. 

The inconsistency has made it hard for me to get a tech to find any issues. 

I have had a tech come out twice now and report speeds are just fine. My issue however is not my speed. It is my high amount of packet loss. 

My setup:

Modem: Arris SB8200 

Router: Netgear Nighthawk XR500

All devices are brand new and have been replaced.

Below are some tests done on ping plotter directly connected to my modem. All tests are wired.

Packet loss connected directly to a modem: 

1. https://imgur.com/a/6L6M0ZX
2. https://imgur.com/P13w4B1
3. https://imgur.com/7G2cP5H
4. https://imgur.com/fM8z15D
5. https://imgur.com/EjDVRDt

Here is a simple ping to google from my terminal:

1. https://imgur.com/eGiYKE7

Can anyone advise on what to do next? I am not sure how I can show this to a tech because whenever they come out they tell me my speeds are fine.