I can get reasonable image transfer rate maybe just over 10M in an upstairs room, a lot depends on local WiFi signal interference, building materials, metal around your setup (even the OTA).
You can link it to your router and use station mode as a routers antennas are far more capable and with routers you also have the option to change wireless channels to a free band which other devices around you are hardly using so increasing your bandwidth.
Another option which may work which it did on my woeful Plus v1, get an SMA extension cable and put your air antenna onto the end and site it away from your rig (like on the floor or something in free space).