No, I’m sorry, but there is not much graffiti in New York and it’s not a particularly dirty city. I don’t know where you’ve seen graffiti in Jersey City (or Weehawken, for that matter); I travel every other day to NYC by car and never see ANY graffiti.
By the way, I have a little trouble believing you are up in the Bronx that much. Or Staten Island. Or Queens. Maybe Brooklyn - that’s a hot spot for residents and tourists.
Believe what you will. I lived in NYC and have friends all over and travel to visit them periodically. That includes all the boroughs. I actually lived on Staten Island years ago on Grymes Hill and have visited there recently. I plan to visit again soon. What I do like about NYC is that graffiti has disappeared from the subway where it was the worst. On my last trip to New York earlier this year, I saw litter on the streets everywhere I went in Manhattan, from the upper east side to Wall Street.