He's no Cap but Kingpin has beaten Captain America before until Redwing saved him.
The point is that Captain America from the 80's isn't the same as Captain America from the 2000's. And that Kingpin fighting characters 30 years ago doesn't mean he can fight them today.
Could have sworn i saw that point earlier in the thread.
Its true though. KP hasnt advanced nearly as much as Cap, feats wise. He has a solid standing as is, it just hasnt had the chance to evolve as much, physically. Most of his growth has been character driven.