My dad is sick of being the only one supporting the family

I’m 17, recently we’ve been short on money and my dad has been in a very bad mood. We have 4 people in total including me and my dad is the only one working and supporting the family while also supporting my grandpa. My dad has 5 other siblings and none of them are helping to support my grandpa. They talk about “We’re all in this together” until money is mentioned everyone goes silent especially the ones that are well off. The thing is my grandpa keeps asking for money to buy cigarettes. He smokes one pack per day.

I’m currently on a gap year and still looking for a part time job. My dad is very pissed with me right now calling me lazy and useless. I’m really trying to get a job but none of them replies to me. He thinks that I’m lying about applying for jobs and thinks I’m not looking for one at all. I’m asian and my dad is the typical asian that goes “I can’t wait for you to start working and making banks so I can retire”. I feel like I’m the way I am because of him, I can’t do something without worrying of getting scolded for absolutely no reason. Whenever my dad gets mad at anyone, I’d be the one catching strays whoever the person is I’d somehow get dragged in. I’m so sick of this and I really want to leave the house but I have nowhere to go. My dad is giving me one last week to get a job or I’ll be stuck working for him. My concern is that once I start working with him he wouldn’t let me leave for college and I’d be stuck with his low pay.

My mum on the other hand thinks her online shop will blow up some day. Hence, she keeps restocking on things and we’ve wasted thousands there and none of them are actually sold. When I confronted my mum saying those things would not sell she’d just completely cut me off and start humming.

I feel like no one in this family is normal, I can’t even vent to them without getting flamed. There was once I was overwhelmed and just burst into tears and instead of comforting me/leaving me alone I got yelled at again and my dad was gonna whip me. I can’t even vent to my own family members I have a brother that’s still relatively normal but he has gotten abit of my dad’s mindset so I can only process all these feelings myself.