Thanks for the reply!
After looking through this most recent data that you have collected it I think it is safe to say that this is not a router issue as your router results look great.
Along with that the jitter in the most recent data also appears to be much better than it initially was.
With that said it looks like the packet loss you are experiencing may be starting at hop 2 as I mentioned before. If you connection is still not what you think it should be you should think about reaching out to your ISP.
If you have any questions about this let me know!