Yes, lots of people are ignorant about lots of things. That in no way means that everyone is ignorant about everything except you, which is basically what so many of you are trying to claim here.
Sure, there were a lot of people who didn't know who Iron Man was. You can probably cite all kinds of examples of that fact. But in no way, shape, or form does that mean that Iron Man was some obscure, unknown entity to people outside of comic book readers. A lot of people may not have been able to tell you his real name or anything at all about him other than "he's that hero with armor or something, yeah?," but he's not this complete and utter enigma either.
I mean, you can find people who've never heard of Superman, Jesus Christ, or Michael Jackson. Does that mean that those are all alien figures to the entirity of the world outside of comic book readers, religious devotees, or music aficionados?
Iron Man has been all over the place. Cartoons as far back as the 60s, numerous songs (including two of his villains
in a song by Paul McCartney), Forbes magazine, and he's even been mentioned in numerous pop culture references on television and movies for ages. The same goes for Thor, the Flash, and loads of other examples used around here. Hell, some people even claim that Wonder Woman is a puzzle to the general public, which is even more absurd.
Again: Your own personal ignorance about something does not equate to the ignorance of the rest of the world; just because you may not have known something, that doesn't mean no one else knew, either. And that seems to be the basis for this whole spiel. Hell, outside of figures such as Michael Jordan, I couldn't tell you a damn thing about the sports world. Does that mean, by default, the general public is equally ignorant? No. And trying to say otherwise is completely and utterly ridiculous.