One basic pillar of contract law basically everywhere is that one can not be bound by a contract that they didn't read, even if they signed it. Usually these cases involve coercion or not knowing the language. If nobody can read the EULA because it's 10 pages of densely written legalese, can they even be bound by it?
Since BigCo deliberately made their EULA harder to read than necessary, that probably counts as "acting in bad faith" which is an entirely different legal avenue for the EULA to be void.