^
Of course, the situation when a player scores a goal in his own goal will be unpleasant for the bettor who lost money. Even if it is a ridiculous mistake or intentional behavior, it is unlikely to mitigate the bettor's frustration. The only good thing is that such situations are not so frequent, so they are quickly forgotten. Personally, I do not understand people who because of this curse, persecute, etc. this player. Anything happens in life and you need to be ready for any situation.
There are lots of situations when you lose the bet. It is just one of them as for me. I don`t think that i would feel better if the goal would be scored on the first minute and by player of the opponent team. The only difference that i will criticize the player of my team for his skills. And, may be, will look with skepticism on him in lineup for next match.