Husbands work schedule

My husband has been working 60hour weeks. He wakes up at 130am to be to work by 3am and he’s lucky if he gets off by 330pm, some nights he’s not even home till 6 or 7pm. So I come home from work and he’s asleep on the couch, his days off he falls asleep any chance he gets. He only gets one day off & He’s only getting like 5hrs of sleep a night. I’m really just looking for some help to better understand what he’s going through, because in my mind I just get so upset when he’s always asleep. I’ve been having to do everything lately and I get snippy toward him sometimes. Any advice from other wives with hard working husbands on how to cater to him being such a hard worker instead of being a nag and a grouch towards him for always sleeping 😭 I know he’s under a lot of stress because he quit smoking last April and I just found out he now picked up chewing tobacco. He was embarrassed I found it and said he’ll try to stop, I guess I just don’t get that either. I want to help him and not cause him stress at home too 😭😭