I take it the firestick is connected wireless to the router, in relation to the router where is the firestick.
One thing to do is too turn off "Smart Wifi", so login into the router at http://192.168.0.1, with the details on the bottom of the hub. Once in see the screenshot and untick "Disable Channel Optimization".
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The patch cable is labelled Cat 7? Ive replaced with a Cat 5e and rebooted the hub. It is a straight connection hub to FireTV “analiti”speed test is now 80Mbps and ookla worse at 30Mbps - May need to allow the hub to fully calibrated after the reboot!