I need advice

I am dating a guy and we both have kids. But his parenting style is horrible do to his upbringing. I also have a son but I raise mine different. We bump heads alot when it comes to him and his children but anyone can see its a road to destruction for him. But changing can really help their relationship. I don't know what to do. I just wanna give up but the kids love me and it yanks at me heart.