And I don't know you so I won't presume, but just about everyone who I've heard complain about Moses and the South Bronx has literally no relationship with the borough and couldn't name three major streets there.
Moses did bad things to the south Bronx, and Sunset Park, and rail transit. He did amazing things with bridges, and democratized access to the shoreline. And many other things. Like I said, his legacy is complicated.
The beach existed long before Moses, and he didn't exactly invent the idea of going to the beach.
Public accessible beaches and parks for hemmed in city dwellers back then in the era of tenements and no air conditioning were not at all common, creating something like Jones Beach was a major public good.
The story of Moses's contributions is generally one of incredible progress and public good in the first era of his career, followed by an increasing descent into arrogance and lust for power that was ultimately highly destructive in many cases.
It's an interesting and nuanced story. Were you to know the first thing about it you'd likely agree.