Oh come on, it's not like Norman is anything of a real threat.
No, seriously guys, Norman can only claim to be Spidey's 'greatest enemy' because he knew his secret identity. That's it. Almost all of Norman's threat came from the fact that he could act on the knowledge of Parker's identity. That, and that he's bat-shit insane. He could barely run the Thunderbolts, and that was mostly due to him being loonier than a squirrel on crack. He hasn't the genius, brilliance, or charisma to seriously go toe-to-toe with Doom, Namor, or Loki. Come on. Doom had the world in his grasp any number of times, and squabbles regularly with Earth's geniuses. Namor is fucking Namor. And Loki eats backstabbery for afternoon tea.
Norman's in power through a fittingly American way of things - political-industrial complex. Those tend not to end very well. Washington only wishes that the country could be run like a corporation.
Norman was set to fall from the get-go. The fun is watching how.