Thank you for your Question.
It is sad that he is loosing all his dear and near ones because of his laid back attitude.
Your friend needs to realize the greatness of the other side of the scenario. For this, as friends, you will have to kind of pull him towards that path. Could be by force a few times to begin with. E.g.
1- show him real love: say, take him to play soccer with children suffering with cancer. Some may not be able to play, but they will sit and cheer for their friends, these kind of things open the shut doors of the heart. Giving love to the less fortunate brings a lot of realization and forces a person to widen up his horizon.
Simultaneously, nothing beats real love! Probably an Arbaen walk to the master of all the hearts Aba Abdullah al-Hussein (s) will definitely make his materialistic world real small, in-fact,close to nothing!
This kind of plans by a circle or friends to help this particular friend will be counted as one of your greatest Ibadah InshaAllah.
2- knowledge. Looks like he doesn’t know much about his religion and his creator. Islam is brought to us for ease and not to make our life miserable. If someone is having a different impression then he hasn’t quiet got the entire scenario. For this, you have to find a way to educate him. Whatever way that may work for him should be used.
InshaAllah that these simple steps help you to help your friend
May Allah have mercy on all of us