XR 500 - Poor benchmarks

Hi Netgear Community,

I am trying to troubleshoot the reason why I have poor scores on my benchmarks through the XR500 portal. I have linked a photo of my scores (img. 1).  My "Speed" and "Ping Under load" scores are D, but my score for "Ping" is A+. Im am unsure why my scores are so low as I am connected by Ethernet and have drivers updated fully. 
My speed from Speedtest.net shows around 800-900mbps, but on the benchmark, it shows around 300mbps. (img. 2)

I'd also like to add that, while I was using the installation wizard from Dumas, it performed a speed test and said my maximum speed is around 800-900 as well, but it is testing 300mbps on the benchmark.

Does anyone have any settings I can change or a way to possibly troubleshoot this? I am not sure if it is on my end or the ISP's end.

Thank you!img. 1img. 2

Note: I do have lots of packet loss while I play video games such as Valorant.