Stop crying like a baby and get into the next contest. Usually guys with this malady, like Mal A. Dee, spend more time replaying past games than concentrating on the next game. So pick your poison. Parlays give great returns. Parlays hold down losses.
Round robins have a decent return if all three win.
If you go 0-3, it cuts your losses as compared with playing all games flat. If you win two out of three, you're either even or show a slight profit. Notice that there is good and bad on both sides, just like in marriage. When you make your decision to marry you take the good with the bad. In betting sports, it's the same scenario, but there is a side I lean to.