I've been trying to troubleshoot my connection for months/years now and I keep trying to get the ISP to check and fix things but there always seems to be some other problem happening and I just want to try and figure out if it's on my end or the ISP still needing to fix something on their end.

I used to get really bad high ping spikes and I THOUGHT they finally fixed that but now instead of the high ping spikes I see random packet loss throughout the route and some of these weird 100% packet loss throughout.

This is usually combined with higher than avg ping spikes as the day goes on, like the ISP is congested but it does not seem like it is our home network cause we have like 400+ download and no one is remotely using that much bandwidth.

They have changed every coax line coming to our house/outside except the one IN the house/wall, but I feel like it probably isn't a problem with this line simply because it appears fine at other times, so the randomness doesn't make sense for it to be that one line issue.

So I'm trying to figure out if it is a router or modem issue OR if it is still on the ISP side beyond our home network.