I wonder whether you were downloading the file from a different server than your wife.
Gaming companies have a lot of servers with different IP but with same domain name and rotate these servers frequently in order to do load balancing. You just happened to be directed to a very slow server quite often?
use Network Traffic View & CurrPorts to see if that's the case
https://www.nirsoft.net/utils/network_traffic_view.html
https://www.nirsoft.net/utils/cports.html
And check ethernet link speed. We don't care what led color it's blinking / solid.