I'm sorry to hear you've been experiencing connection problems. I did take a look from this end and so far I'm not seeing any indications of connection issues to the modem. In the connection history I'm only seeing what appears to be a Google router setup so it may be worth trying a direct connection again to see if that helps. Currently I'm showing that the Ethernet on the modem is inactive which could explain the issues you're seeing. You can try leaving a PC connected for an extended prior of time and see if the issue comes back.
-Chris