So a bunch of people have already said about using the ethernet adapter. Which is exactly what I would say.
But for argument sake and for people who are using the switch lite, get yourself a Wi-Fi analyzer. Like this one https://play.google.com/store/apps/details?id=com.vrem.wifianalyzer
You're living in the countryside you shouldn't have a lot of EMI. Could be just poor signal. The analyzer will help you visualize what the Wi-Fi is where the switch is.
Of course this is all assuming that the problem is on your side of the connection and not from your ISP.