I just give up

We raised our oldest grandson. He's 22. some shit has happened to him that has him back home with us. At the same time our youngest son is here. I am angry he is here. Every chance I get I tell him to get the hell out. Our oldest grandson has bitched to me over and over again about him being here. SO today they come home and I tell him to get out and all of a sudden our grandson turned on me and started to scream at me. Now all of a sudden he is standing up for his lazy ass uncle. He also thinks because he is buying groceries that he is now in charge of this house. more than we are. He didn't pay the mortgage and his name is NOT on the house papers in any way. It is mine and hubbies. Yet he seems to think because he buys the food he can now take over. He yells at me that he has held his tongue long enough and hes not gonna let me get away with this shit any more. WHAT THE FUCK? Here is a kid who has been bitching at me for months about his lazy ass uncle living off us and that we need to get him out and we keep trying but he just wont get out. NOW he's yelling at me. well I told him  he can get the fuck out too. I am done with both of them