Wikipedia is far more accurate than not. Sure anyone can change a Wikipedia page, but the page will state clearly if the changes don't include supporting citations etc, and if the changed information is determined to be exaggerated or false, the changes are removed within a day or two.

Google and other search engines are great research tools, if you know how to use them. 

Most journalism is still done the old fashioned way. The problem is the old fashioned way is more expensive. Thus you have news services like Reuters and AP, as well as large circulation papers like WaPo and the New York Times, and publicly funded sources like Pro Publica, providing the actual investigative journalism. 

Websites revenues are click based, and cable news is ratings based so they will just put our whatever gets eyeballs.