My Mom Is The Neighborhood Villain

My family and I moved into our current house last year after my parents spent years and hundreds of thousands of dollars making it into their dream home. And it would've been their perfect house if not for the bar across the street. They continue to have people out in front of it well after quiet hours creating so much noise that it sounds like they're in the house with us. We rent out a part of the house and the tenets have started complaining as well (the old tenets before we moved did to but apparently they didn't know that till after they bought it). My mom can't sleep with all the noise and because she handles all the rentals, the complaints have been driving her insane. She's done everything she can think of: calling 311 on them, notifying the hoa and neighbors, getting the state involved, etc. The bar has in return started a smear campaign against her and have hosted nights where they all stand outside just to annoy her. She's heard them through our ring camera starting rumors about us and using slurs (we're black). We can't sell the house because we'd lose a lot of money, but we don't know what else to do. Can someone help please?