So he invades you. He uses the same setup every single time. He defeats you and then he posts his victories. That just sounds like, well, invading. It's kind of a big part of all dark souls games. But if this is upsetting you that much, there are ways to combat it. You can play offline when you are doing PvE areas that you find difficult, as there is little reason to be online if you only plan on playing PvE for this period. If you have friends, you can always play with a summon if you can't take him one on one, make sure to carry some seeds with you if he relies mainly on using enemies as shields. You can play briefly unembered in certain areas that he is constantly invading. Or, and I do not mean this as an insult, you can just practice and get better at the game. So the next time I invade you using the same weapons and tactics, you can turn the tables.