Try updating the to the newest version of java. Also look at your firewall settings and make sure java and mine craft are ticked. If none of this works, try 1.10
I tried this, but it only made it worse. I also noticed that when my PC is on, all other devices are slower
other people are having the same issue but whether or not pvp is causing connection issues is left to be seen. I can understand lag on the server but not with ping. Either way no one has successfully solved their connection problem to net so far. Crew once helped mineverse ping issues so maybe he can do something for net.