should i sell my soul to the corporate devil?

i recently started work as a paralegal at an ethnically diverse law firm. however, the corporate culture (actually its a small private firm managed by one man) is manipulative and selfish. there are no boundries as far as work accountability is concerned. our meetings are basically focused on assigning blame. and the co-workers are also selfish. if we work late hours, they ';sneak in';food without asking (even politely) the new person (one other person besides me). secondly my immediate supervisor has an extremely flexible schedule due to her kid and comes and goes as she pleases, and takes days off without any notice or reason. while, i'm expected to pick up on her work and get the blame too. boss has mentioned many times in meetings that i am available to work more hours since i dont have children. 3rd everyone is allowed to give me work. 4th i commute 2 1/2 hrs each day and work 6 days a week. i want to confront my boss but cant afford to lose the money. is this normal?should i stay?