The second reason why you could be losing at football bets is the selection of
BETTING MARKETS.
Majority of newcomers in football betting place theit bets on the main markets (outcome, handicap, total), but at the moment bookmakers are increasingly offering to bet on many other markets - corners, cards, shots, fouls, throw-ins, goal kicks and others. At the same time, the line at additional markets is usually weaker than at the main ones, which makes it easier to gain an advantage there.
Read about all pitfalls in football betting and how to avoid them at
https://corner-stats.com/betting-on-football