I think my brother is depressed- I need advice

So to start, he’s never really been lucky in life. He went to school to be a cop and unfortunately can’t pursue his dream after an injury to his knee. He has always been really unlucky with women, he had one serious girl he talked to and she died in a car crash, other than that he’s talked to girls but he’s sooo nice he gets taken advantage of a lot and always left for other guys. He goes through the motions everyday, he works for my dad (bc my dad wants to give him the company soon) and he goes to our friends ranch and drinks until it’s time to go home for bed. He gets off work at like 6 bc he gets everything ready for the next day when he gets home and then goes and drinks the rest of the day, wakes up at 4-5am and does the same thing the next day. My dad unfortunately has driven drunk since we were young and has been lucky enough to never injure anyone but within the last few years my brother has started to do it to. My brother got into an accident the other day after a lucky streak of getting home while driving drunk and totaled his very expensive car after hitting a pole and still proceeded to drive it home somehow bc he wants drunk and didn’t want to call the cops. My mom lost her dad to a drunk driver so she is in a hard place rn thinking history will repeat itself. While drunk driving is the issue obviously I know that, I think it’s something bigger than that, I truly believe he’s depressed but the thing is he will never admit it. I can’t go to my parents bc when I was younger I told them how I was depressed and they basically got mad at me bc “I have everything in life”. Anyway, yes my parents should see the big picture, be supportive, and try to help their kids, it just doesn’t work out that way. Yes my brother shouldn’t be driving drunk and yes my dad is a shit example. I’m coming on here for help on what I can do.. I’m the youngest so it’s hard for me to get anyone to hear me out. My dad is very judgmental and will make my brother feel like shit for having any feelings and my moms logic is “if you have everything you want you can’t/shouldn’t be depressed”. Please don’t come on here and tell me all the things that are wrong with the situation bc I’m very aware, I just need help on how I can help him.