Wikipedia actually isn't a bad source; on average it rates comparably on accuracy to Britannica, believe it or not. Just got to look out for those highly controversial issues-of-the-moment where people are editing the articles in bad faith....
I'm with you - any subjdct where the information is critical or you need more than a brief overview, your research can't end with Wikipedia. Got to dig further.
@ElectricMink I agree. It's a good place to get an overview. But you have to get better sources to be credible.