So I've been getting pretty slow download speed on my Wi-Fi 5G(~160mbps) and my download speed on cable is ~800mbps, I know that something is wrong because my Wi-Fi 5GHz upload speed is ~400mbps the same as on cable... so by this logic I should be getting at least ~400mbps download speed on my Wi-Fi, I don't know what is wrong, I have the latest version of the firmware, this is my first day using this router, does anyone know what could be wrong?

More info:

I got this router today and my old router got higher Wi-Fi 5G download speed (~300mbps), this one is newer and has also newer features, so it should be working fine.
All the tests were done with only one device connected to the router.

My devices are capable of more download speed and were getting higher speeds with my old router.

I tested this between multiple devices, so this really is happening because of the router (not my devices).

My speed on cable is
Download: ~800mbps Upload: ~400mbps

My speed on Wi-Fi 5G is

Download: ~160mbps Upload: ~400mbps
 

My speed on Wi-Fi 2G is

Download: ~70mbps Upload: ~70mbps