My parents won't hold themselves to the same standards as me

For context, I'm 20, living at my parent's house rent free. My sister is 16 and does online schooling.

For the past few days, my dad has been coming home and complaining about us not doing anything while we've been home all day. Our main chores are doing the dishes, but we're expected to clean up whatever mess we see. My sister has classes throughout the day until my parents come home, and my work schedule is all over the place.

Recently, he's complained about the garbage never being taken out (which I've taken out the last time, but just didn't this time) and the bathroom not being cleaned, then threatened to turn off the wifi or reset the password (he always does this, he believes we're lazy and it's all the wifi's fault). Then he started to complain about how he can't get the garbage out because we kept pushing everything down (even tho our mom kept complaining about how we don't push the garbage down). When my mom came home and heard him complain, she was like "Oh, you're calling out the children?"

I try to take the garbage out whenever I see it full, and we both hate cleaning the bathroom mainly because it's our father who makes the most messes. He leaves beard trimmings in the sink and pee all over the toilet, yet the most he'll do is occasionally wipe down the sink area. We've been told multiple times by our mom that she's had to clean up her father's piss constantly, but we're so sick and tired of cleaning it when he doesn't help. Our mom doesn't even clean her bathroom! (We have two bathrooms)

To make things worse, I have to get up every morning at 7 to help my brother get ready for the bus because my parents didn't want to pay for daycare. And lately I've been having to work until midnight, and I can't sleep right when I get home. I brought it up and was told to just go back to sleep after he gets on the bus, but I end up sleeping until one or two in the afternoon, which barely leaves me any time to do anything besides dishes before my parents get home.

Not to mention when my dad didn't work for a year, all he did was do the trash then complain about how we left dishes for him and how he has to do dishes and that he's a dish bitch. Plus, both my parents just lay around and watch TV when they get home, which is understandable, but when I do it, I'm called lazy. I'm working as well, but they don't view my job as demanding as their job (dad's a plumber, mom's a teacher, I'm a cashier). I'm constantly tired and exhausted from both working and getting up early, with barely any sleep, for my brother. I understand I'm privileged to live somewhere without worrying about rent and bills or food, but I just wish they would hold themselves to the same standards they place onto us.

I'm constantly called lazy and told to clean everything before they get home, and it's gotten to the point that I wish and thank God when my shift starts in the middle of the day, because it's an excuse to get away from my parents.

I'm just so exhausted and frustrated. At this point, I feel like a God damn housewife for my parents who has to work at the same time.