I'm annoyed when my sister who lives with me invites friends over to my house
Why are you mad? Is it because her friends make a mess in your home?
Yeah, I hate it when my bed is taken as a lounge and the kitchen is almost filled with food trash
I can see why you are so upset. Tell your sister that you absolutely don't want anyone using your room when they come over and that they need to clean up the communal living spaces. If you don't speak up, the problem is unlikely to go away on its own.
I'm going to kick them out as soon I see them on my couch. Bother her friends or not.
You gotta show them who's the boss of the house! Take charge of where you live so they can learn to respect where they are. How about only letting your sister and her friends use one room, and if they take good care of it they can use more?