1.) Housemates: that’s not really the landlord’s fault, though. That’s a personal disagreement with her roommates. It’s not that I don’t empathize, but roommates not doing the dishes or picking up their clothing from the floor just isn’t gonna be viewed as a reason she can break a contract with her landlord. If the landlord is fulfilling his/her end of the contract, then that’s pretty much where their legal liability ends in a lot of cases. Your landlord isn’t responsible for mothering your roommates and making them clean the bathroom once a week

2.) Moving rooms: was this in writing, or an informal agreement? Because unless that’s a provision of the lease, that pretty much has no bearing on breaking it.

3.) flies: I’m gonna guess her dirty roommates play more of a hand in that than anything. Some fly tape and a good scrub of the apartment would probably make some good improvements to that problem, but I’m not sure what the landlord is gonna be able to do if her roommates continue to be disgusting.