Yes, I think gamblers like to blame others. And these are of course the players and or teams that are responsible for the gamblers losing their bet. Still, there is only one person you should blame and that is the gambler himself, as he himself made the decision to bet money. If you can't stand losing once, it's better not to bet any money at all, then you can't lose in the end.
Not all mate because I'm more inclined to believe that there are a lot more gamblers who takes and accepts their loss in a calm way and will not go in such ways like blaming others if they lost the bet, including the players or fighters where they bet on because that's the part of the bet. You yourself as a gambler know that even if the team you bet on got a much higher chance, it doesn't mean that they are the ones who will in the end and that's why there's a term upset.
I personally accept my losses without any problem because they are just a part of gambling and there is little you can do about them since it is mostly based on luck. I don't blame anyone not even myself because before placing any bet I consider whether or not I would regret it later. If there's no regrets then I go ahead and place the bet.
To be honest, I only bet for fun and I don't get upset when I lose a bet. Instead I prefer to reflect on what went wrong and focus on enjoying the game. I easily forget about the loss since I primarily bet on sports games and what it matters much to me is to have fun:)
Betting on sports is a very good choice as it's more reasonable and fair to me, yet I wonder how you can be betting on sports for fun when the sport is fun itself. I believe that betting on casino games is the one to be engaged with the view of being fun as you get entertained as required with your favourite games for a token.
Regardless, it's the choice of anyone to bet, they should also be able to embrace the outcome. I like to bet on sports and I bet it with a reasonable amount of money, and even at that, I get to accept the outcome as an adult. But I win more than I lose, which is an encouragement because I only bet on winning or losing.