Gambling addiction has certainly made this person unable to think which is right from wrong. All he knew is that, gambling can make him win big and become rich in the process, but for that to happen, he needs to keep betting all day, which shouldn't be done by a normal individual.
However, behind all of these, this person is badly needed the support system coming from his family and loved ones. Negative criticisms won't do nothing good, but his family should help him in the process so he can make positive changes in time.