Gambling can change the attitude of someone who tends to become a stubborn person, and indeed this can of course have an impact on their relationships, whether it be family, partner or friendship relationships, where they will experience the bad effects of gambling, which can make them change as well.
Can gambling actually change someone who is bad mannered for good instead of getting them more complicated in their wrong doings, same way we can see gambling as a means of getting ourselves attached to something that could get us being occupied than having much time on unnecessary things, we should also be mindful of not allowing irresponsible gambling to affect our personal relationships.