Its only my impression or apart the Sopranos,Hollywood or the TV can go out the mafia glorious old days?

Was made tons of movies on the golden age from the prohibition to the 1980s but apart the Soprano or the mob doctor,few things on the mafia decline.
A movie or maybe a tv series were the mob is decimated by rats and main characther must survive between betrayl and the feds that try on everyway to made him flip.
The Sopranos is a good tv serie but its not realistic.

But Im seeing it from Italy,Im wrong?