So okay, I bought Archer C5 v4. My packet loss is 1-2% via WiFI, non existing via Ethernet. I also have two different routers, and they both have 0% Packet Loss via WiFi in the same devices - gaming laptop, Xbox One X, Galaxy S8. I tried every settings I know, even updated firmware, couple of resets - no avail. So my question is simple - RMA this router, because something is clearly wrong with WiFi, because other routers on same settings manages not to drop packets?