the ideological views on differences in epistemology aside, this fundamental truth remains: zizek will not actually teach you anything, because he does not have anything to say. search through his videos - and writings, if you insist - and you will see that. it is all speculation, leaps of logic, half-formed opinions and, more than anything else, unsubstantial rant. say what you will, but he does not teach.
it is absolute sophistry.
i don't agree with all of her positions, but if you want a new chomsky, i might suggest ignoring zizek and looking more towards naomi klein. in doing so, you have to understand chomsky as an activist and teacher in the public discourse, that is a creator of important texts and a leader of political movements, rather than an ivory tower academic. but, who gives a fuck about ivory tower academics?