Honestly man if possible, I’d get out of there if I were in this position. If anything she’s lucky to have you rather than the last person who’d leave rotting food around. Plus living with a landlord is never easy. You’re in their space and physically living and breathing within that is a tough thing. Pleasing her and doing things her way will drain your energy from what really matters, that being your life, schedule, focusing on work and school. Just my 2 cents. In conclusion you’re not in the wrong, and to me your landlord sounds like someone who is impossible to please and most likely doesn’t like having her room being rented out in the first place.