Hi thetateman,
Thanks for getting in touch!
The screenshot you uploaded shows ~70% packet loss on hops 2 - 9. This is a really good indicator that the issues you're having are either with the cable between hop 1 (usually your router) and hop 2, or with the device at hop 2.
Given that you're in an apartment, it's hard to say who owns that device. It could be the property management or Cox. I would probably start by sending this same screenshot to Cox, explain you've been having issues at hop 2, and ask if they own that device.
Here's a guide on how you can go about building your case, making contact, and then escalating the issue if things aren't progressing:
https://www.pingplotter.com/fix-your-network/build-a-case/.Good luck to you!