~I don't think that drinking alcohol can be a good solution to any problem, let alone gambling. Usually people become more aggressive after a drink or two, and while their resentment about being unlucky in a relationship, for example, can result in breaking a plate or sending an angry message, it can end up really badly if this is about gambling.
You are right people can get aggressive if they lose in gaming and if they will start drinking alchohal it will be fully bad for them not only mentally but physically alcohol is ingerious to health so better keep calm and not let gambling affect you emotionally better if you stay calm and gamble with small amount of money that you can afford to lose but gamble in limitted time and with limited amount of money.
It's drinking alcohol is what makes them aggressive, not the fact that they are losing(that's a different story). It's much harder for people to control themselves being under influence of alcohol, even if they are able of doing it otherwise.
~ Which is why at physical casinos if they see that you are gambling an important amount of money then drinks are free for you, it is well known that alcohol diminishes your inhibitions and your ability to think critically and when it comes to gambling this is very important since whether you are a professional gambler or just someone that likes to gamble to get some fun you are going to need to know when to stop and this is going to be almost impossible to do if you are under the influence of alcohol.
Yep, that's what they are doing in most land-based casinos. That's why I say gambling online is safer for your health and for your budget.