Somebody bid higher than you. That's how auctions work. Many people bid, one person wins - the odds are not in your favour unless you bid very high and pay up.
You're complaining that people are sniping you but in the example you gave above, you were sniping too! You came into the auction with a few seconds left and entered a bid that was three times more than the current high bid in an attempt to blow everybody else out of the water, leaving them no time to bid again. That's the very definition of sniping. It failed (because somebody sniped higher) and you didn't get the item. Move on!