Download speed drops to ~30mbps on a 500mbps plan daily. Upload speed unaffected.

I noticed others have had this exact same issue in the past year.

Download speeds constantly drop to 30 mbps on a 500 mbps plan. | Cox Community

Some days the download speed will revert to what it should be. More often than not, nothing changes unless I reset the modem and router. Even then, the correct download speed only remains for a few minutes before reverting to ~30mbps.

I'm paying $150/month for this. The services advertised are not being provided. Not even close.