I don't know why the city accepts this kind of degradation in one of its biggest tourist attractions. The number of stabbings every year in this corner of the park is unacceptable
Every single peer city to Boston in this country is experiencing identical/interchangeable issues and has been for some time. Why don't you go ask all of those big city mayors--NYC, Philly, Baltimore, DC, Miami, Atlanta, SF, Portland, LA, etc. ad nauseum--why they "accept" the kind of "degradation" that characterizes their equivalents to Boston Common?
Otherwise, please go-ahead and try to argue somehow, with whatever statistics you can marshal, that what's happening in Boston is somehow unique or exceptional... I'll wait!