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EBay worst-run company I have ever seen: Carl Icahn

Matthew J. Belvedere
Scott Eelis | Bloomberg | Getty Images

Activist investor Carl Icahn told CNBC Wednesday that eBay has the worst corporate governance he's ever seen, and that's a symptom of how badly American companies are run.

In a "Squawk Box" interview, Icahn said he likes to get involved in companies and shake things up. He said that while his critics say he's just in it for the money, he believes he's doing something good for America by getting more value out for investors.

Icahn said he believes even lawmakers in Washington, D.C., are doing a better job running the country than corporate boards are doing running American companies.

Icahn has been turning his ire on eBay (EBAY)-agitating the online marketplace for months about spinning off its PayPal platform from its Internet retail business.

In an interview posted Tuesday in The Wall Street Journal, eBay CEO John Donahoe said a breakup of the company is a bad idea. He also defended eBay board member and venture capitalist Marc Andreessen -whom Icahn accused of conflicts of interest.

In a letter to shareholders, Icahn said Andreessen had invested in and actively advised five direct competitors of eBay. The billionaire also took issue with the sale of Skype in September 2009 to an investor group that included Andreessen.

Last week, Andreessen defended himself directly in an interview with the Journal-saying that venture capitalists who sit on the boards of private and public technology companies follow the same ethics practices as other industries.

Andreessen also said he recuses himself from boardroom discussions that could involve companies his firm backs.

(Read more: Andreessen strikes back at Icahn in eBay spat )

-By CNBC's Matthew J. Belvedere . Follow him on Twitter @Matt_SquawkCNBC .