Tuan Do

Allin was made by opponent before cards dealt, so this means I should fold two aces??? lol, looks like you are newbie in poker... and I don't need to watch poker I have experience more than 20 years playing it, just wanted to proof that stake poker is rigged if you go all in at the beginning

I think this kind of thing is pretty common in poker. Having pair Aces doesn’t always guarantee a win if the board doesn’t help. In your case, A9 won because your opponent hit a flush. There will be more freeroll tournaments, so feel free to try again you might get luckier next time.