Let me make life easier for you. I am a network engineer and communications specialist with over 16 years at Cox Communications.
If you are having slow internet and packet loss, there are a NUMBER of reasons why this can happen. Since I have a good modem, and an ethernet connection, here is my speedtest - Which btw I will run at 7 pm, and tomorrow, at several intervals and post here.
https://www.speedtest.net/result/16085832701
I am in Virginia beach, and the test ran to Fairfax, Va. I am on the 500 down, 50 up speed and as you can see, I am easily getting what I pay for. Of course, my equipment is up to date, as is my computer.
So - Instead of believing what the OP posted, There are some things that can help if you are not getting good speed and you are having issues. I am in the forums quite often, and will help you out as much as possible. You would be surprised how easy it is to fix MANY issues.
You aren't wrong, but OP's post was 4 years ago. Cox has made a lot of infrastructure upgrades since then that improved performance. Cox installed fiber in my neighborhood. The node is about 100 feet from my tap. My speeds are virtually identical to yours.
