rent right or wrong ??

So I recently dropped out of school bc I'm racked in debt. I moved out the dorms into my brother's apartment. Him and his boyfriend live together. So it's a one bedroom. They were nice enough to let me stay with them. So I sleep in the living room on the futon. I get no privacy...I have a small closet to store my belongings. I work a part time job. I buy my own food and supplies. I clean for them. I'm trying to save up for my own place. The thing is...we are splitting the rent among us three equally. About $300 each. I feel like I should pay a bit less due to me not even having a proper room or privacy. Yet I get that they were nice enough to have me stay with them. Idk how to approach my brother as well. I hate his BF bc he's super shady towards me. I really am saving up. I don't spend my money on myself besides for food and transportation. At this rate I feel like my money is going to be eaten up due to rent each month and me not being able to have enough to even move out. Am I wrong to ask for a lowered rent price or should I just be grateful?? Please don't be negative, I'm just trying to straighten my life right now.