I have had this issue now for around 6 months. The issue is when I am downloading a game, I lag in discord to the point where it says I have 5000 ping but everyone can hear me but I cant hear them. Also in games all the time i get random lag. In fortnite i get packet loss every 10 seconds which is strange. I use ethernet and the cable runs under the house. But I have had this cable for over 2 years now and am wondering if it is damaged and that is the issue. Or maybe some dust in the port of the router? I'm not sure but I attached an image showing my download and upload speeds.