How many chances do you give?

Anyone ever married someone with an addiction problem? Drugs, alcohol, gambling, etc? One or all? How many chances do you give, what was the turning point if you left, what caused you to stay? Is it wrong to walk away if the vows you said were through sickness and health? Do you help them or get them help first and then leave? Do you leave and let them figure it out? Anyone successfully managed to turn things around with their spouse who struggled? I get many ppl would tell me to just leave or go or whatever but are there reasons are purposes to stay? Clearly I love this person, we’ve been together for many years, but I’m hurt. This is the third time. Was I wrong for not seeing things?

Tl;dr
Can your marriage have hope if your spouse has struggled with the problem multiple times? If so how? If not why?