I could feel your pains and I'm so sorry for your loss.
This world cup has been a very confusing one and a very challenging one at such, predictions shouldn't be made with certainty. I watch the Argentina and Saudi Arabia match and I felt pity for Argentina but also felt happy for Saudi players because they all went home with a new rolls Royce don't know if you're aware of that.
You shouldn't be so mad because Argentina couldn't deliver you t your victory because you didn't practice tye capital risk management and you went all In with your capital, hence underrating the ability of another player.
And that is why it is always adviced not to gamble with the money you can't afford to lose.