You do realize that there are people with CCNP and CCIE certifications playing this game with issues right? These people are more qualified than 99% of people out there to *** network issues, and yet they still have these issues.
If it was an ISP issue there would be specific ISP's with common problems, and this is not true.
If it's a local area issue then the problems would be in geographical pockets, again this is not true.
If it's a localized to the house/office level issue then it would be consistent until configuration changes are made or equipment altered. Yet again not true.
If it was an issue on one of the major network hubs, there would be large pocket issues, consistent to geography, again not true.
If it was somewhere in between, the packet loss and spikes would show in the trace, again still not true. Most loss is at the data center itself in most viable traces.
Yes there are SOME local network issues for SOME players, most of these players know the local problems and do not report it due to it being on their end. Before posting something like this you may wish to take a look at the various traces, and get some added empirical data from different sources as well, this is what we call using the scientific method to test your hypothesis. As this relates to Computer Science, using the scientific method on a hypothesis is probably a good idea.
Have a good day!