I know it's hard to keep going, but you shouldn't give up. I lost 40+ games to Gehaktbal in a row like a year ago and yet I didn't give up. One day you will be the one to beat that guy 11-0 if you keep practicing and learning.
He can use lag as an excuse, even in a 5-bar connection. Even on a regular TV offline play he can blame lag since TVs usually have more than 10 ms latency.
The closest you can get is 1 ms latency on a gaming monitor, which is what is used at live tournaments.
honestly the last time I got outplayed this bad by a specific player, I didn't go online for a month a and half. I re watched all my losses (thanks save replay), put my game play under a microscope, looked at what i was doing wrong, retooled my gameplay and came back a stronger player.
But right now, I don't have that type of patience. in all honestly i want to find this guy asap and challenge him , sure it might be another blow up, but i just have to fight him again. I know what i did wrong ( i was playing too cautious/scared and he out footsied me to death), i know what i need to do differently, but i just have to fight this guy again NOW!