What do I do (HELP!!!!)

So me and my girl have been going out for about 2 years now and for the longest I have always had an issue with her parents. Her dad is basically a deadbeat can’t hold a job because he always gets fired for doing stupid stuff. Didn’t get a high school degree and is a drunk who is also super control freak. Her mom is a hard worker but she doesn’t do much to stop her dad from basically yelling at all her siblings and just making everyone feel like shit. One time he was drunk and told all my girls siblings (5 of them) that he wished that they all were dead. Mom didn’t do anything.... not only that but my girl basically takes care of all the kids since the mom is always working so she literally is always just stuck home and has no social life what so ever. Not only that but her dad is such a control freak me and her can never do things together even if it is at my own family’s house. She can never stay for too long and she always ends up just feeling like she is stuck in life because of it. She can’t have a job because she is going to college and constantly taking care of her siblings. So she can’t ever go out and get her own stuff or even treat her self out just so that she isn’t so depressed all the time. I as a boyfriend love her so much but I just feel so god damn powerless like I can’t do anything but just be there for her. It’s so infuriating that such an amazing person has to go through so much. But I don’t even know if I’m the future when I do marry her and have kids if I want to even have her parents apart of our kids lives. I know it’s unfair to her and her parents but I mean I just don’t want my kids to be exposed to things like this. I just don’t know what to do or to expect. Should I talk to the parents or should I just tell her how I feel I mean I have before but ever time I just feel like it doesn’t help the situation that my girl is in. If anything it makes it worse. Help please what should I even do?