Most of us gamblers probaly have experience that, but it's a bad attitude mate, it's like we aren't good in accepting our losses and that we would involve other people with our disappointment in gambling. It normally happen when we aren't gambling for entertainment only and we do risk money more than our budget, I would not use "money you can affor to lose", as there are times you can afford to lose the money you are gambling but it's already out of your budge, so in the end, it will have a big effect on your emotion.
Loosing is not a good feeling, even if it's just a game, everybody would feel better when they win, winnings radiates a feeling of fulfilment, but when it's a lose then it'll be the total oposit, a feeling of being a looser. However that losing makes us feel, I think that it'll not be fair to take it out on others, because they didn't force you to gamble and lose your money. It's ok to feel sad after a lose, afterall we're humans and it's a part of our inborn characteristics to react when we don't win, but for the sake of our loved ones, there's need to apply wisdom and understand that it's just a game, tomorrow can be better. Self control is a very important ability to have, without it our lives will be full of regrets, because we can hurt our loved ones in the moment of unhappiness.