I was very surprised at the time how many adults can't control themselves on their own. They drink too much alcohol, gamble, cheat on their wives and husbands, and so on.
These people can and should be saved, but they themselves must seek help or their family members must do so.
The most important step in a person's recovery is to understand that they have a problem and want to get rid of it.
How old are you? If you still get surprised by the way people are, I guess you haven't lived enough. What I like about drinkers and gamblers ... well, yes they are assholes but if you get close to some and you talk honestly, you see that many of them are quite open and know their failings and have no misunderstanding about who they are.
Help is harder than it sounds. People judge. So find a friend, a confidante, who you tell everything.