Do you think it's bad if I'm rude to my father for the way he keeps the house clean?
Why would you be rude to your father for the way he keeps the house clean?
He never cleans and it's very messy.
It is expected that your father should keep the house clean but you shouldn't be rude to him about it. Talk to him and offer to help if he can't do the cleaning on his own.
I've tried he won't listen and can't be bothered to change.
Try to speak to him again and maybe try to be more insistent about the importance of cleaning. Set up a chart with household chores that you can share and keep track of. That may help set up good patterns of behavior.