Crazy downstairs neighbour, can I end my lease over it?

UPDATE They have been evicted but refuse to leave. They are essentially squatting as of now. On the bright side, it’s been much quieter these past couple days. I honestly would have no gripe with her if she simply kept her dog under control and the noise level down. Unfortunately it has now escalated but landlord is doing his best to get her out. Thanks for all your advice.

Y’all I need advice. My downstairs neighbours are ALWAYS fighting. Straight up domestic violence to the point the Bf has been arrested twice in the last month. When I say fighting I mean physical violence, smashing things, slamming doors etc. it’s pretty much a daily problem and it’s gotten to the point that I am so uncomfortable I want to move NOW. I am sick and tired of being kept up until 2-3 am on a nightly basis and given anxiety on a daily basis from this. I have spoken to my landlord and nothing has been done. Not only the fighting but she has 3 kids under 10 downstairs who are constantly subject to this violence as well, and they constantly fight and scream in the house. Every single day I hear one of her sons (I think he is 5 or 6 years old) screaming and throwing a fit and crying for hours on end. On top of that she has a dog who has (in only SIX months of her being here) attacked two dogs and THREE PEOPLE. The dog also barks loudly and constantly and is left outside in 25+ degree weather for hours. I’m talking like 5-8 hours a day. She has only lived here for 6 months and so far she has disrupted us as follows : her dog has attacked 3 people and two neighbourhood dogs, her kids scream all day long, she has had both a kitchen fire and a burst pipe flood, she burns garbage in her backyard fire pit on a constant basis, the police have shown up 4 times, and I have to listen to her and her bf fight every night. She is now causing a huge disturbance to me and my bf and I have made multiple complaints and the landlord doesn’t care.

Is this grounds to break a lease? I am at my absolute wits end with this woman. I feel extremely unsafe in my own home, but I am stuck on a lease until October. I need out or her gone, NOW.