@Promocodeudo it looks like your brother is in a serious condition and needs to be treated immediately. If he continues like thats, he is worried that he will be mentally affected because your brother seems to no longer care about anyone around him and is only focus on winning big at gambling, possibly the big thing is that if he doesn't get win that, he will experience stress and maybe now your brother has spent a lot of money chasing his losses, advising people who are addicted is just a waste and I agree with what @madnessteat said to immediately Bring in a professional center that can handle this if you care about your brother.
If the person get affected by the gambling,the brother or the family member should help to recover from gambling addiction.The gambling is not the wrong one,many easy earning using the gambling without much impact from the gambling.The gambling play should play with some strategy to avoid of the continuous loss in the gambling.Seems your brother get mentally stressed because of the targeting the loss damage of the previous games.But it’s essential to understand the gambling will give you good money one day.But targeting the gambling loss not work for the gambler in the short period of time.The family member should advice their family gambling addicted person.