This thing that grates me about Extra Credits is that they are very full of themselves. Especially to me, that "I have worked in the Game Industry, I must be an expert" attitude is immensely irritating. Seriously, most people I know, even those with two decades of experience, are not in a position to lecture society at large based on their vocational history. Based on their smarts, their personal experience and ideas, sure, but EC's attitude is just cheap.
Also, this industry is REALLY one of the easiest ones to get into, if you have the right skill set - especially in these days. The lecture on "how to be a game designer" was just patronising and to me sounded like mostly self-congratulatory lines.
Edit: Idealism, to me, is also a rather dangerous thing. Ability to compromise and change a difficult situation step by step through rational, realistic suggestions scores much higher. Alas, Extra Credits are way on the idealist side of things whereas Jim seems more down-to-earth despite the character he is playing being a narcissistic nutjob.