I spend more on sports betting than casino games. But my weakness is still betting with many matches in the parlay bet slip. Too many matches added allow for bigger Odds, but the risk is also bigger. I know that but still often do it. If the losing situation continues then I will decide to switch to single bets with good odds. Making several bets will not be a problem.
In gambling, no one really succeeds in winning consistently. Sometimes we are lucky, but we also have to be aware of accepting the reality if we lose.