No problems with connection at all during the game, no stuttering, no connection lost, nothing yet suddenly as soon as I was clearly winning...
Defeat, sync error detected immediately and cleanly, no stuttering just from gameplay to defeat, I recorded it with shadow play here:
https://www.youtube.com/watch?v=pHyPFYVViMs&feature=youtu.be
Due to the circumstances it looks fucking fishy to me but I 'm clearly biased. What do you think, bug, shitty connection or hack?
EDIT: WTF In game it says it was a victory yet I have dropped over 10 ranks in the leaderboards...
Sync error can be coused both intentionally or by a hardware error / OS bug on either side. Mind that such result doesn't benefit any side, the win is decided by trust ranking. This raniking depends on how many times you dropped or got sync error, so if somebody did it on purpouse many times he won't really advance in ladder.
The fact that you dropped on the ladder may be connected to performance of other players. You can't loose elo after won match, but the others can get more from their matches than you did.
Last but not the least, this is a public cheating accusation, forbidden on this site. You should remove the video link from your post so that it doesn't violate site rules.
A) well yeah its look very strange. You win the game and then bum^^. Tip: Look at his profil and watch how many drops and dispute he has^^. Snyerror can be hack, but not allways. And bugsplit / dumb createfile is just Relics code.
B) About the trust rating. Yes and no. In CoH 1 we had a trustrating. Not at all in coh2. When you got syn error after the game was running a while, most of the times the games looks, who is winning.
C) when you get sny error after loadingscreen, means game did not run a single sec, you often get a defeat. This happens, when enemies PC/ Internet is too slow, or when he drophacks you. Both is possible.
So y, you can get big advance in the ladder, but only if the sny error comes before the game started.