Chicken, eggs and mayonnaise

An old chicken and egg problem reworded in culinary terms: do Americans hate mayonnaise because mayonnaise in the U.S. is, well, crap, or the mayonnaise manufacturers see no need to make good product that nobody would buy?

One might think the key to the problem is the fact that Coca-Cola made in the U.S. is also total crap, compared to same Coca-Cola from, say, Mexico (real sugar in the latter vs corn syrup in the former makes all the difference). This one, however, is quite obvious: corn syrup is used because it's cheaper, and taste degradation can be mended via aggressive advertising. Which neatly conforms the common sense rule that the more advertisement there is, the crappier the product.

There's not much of advertisement for mayonnaise, however, which might be a sign that mayonnaise is considered a lost cause, being still made purely out of inertia. (Oooh, another conspiracy!) Or, speaking of conspiracies, may be the government forces crappy mayonnaise to prevent obesity. Well, in this case, it's obviously not working!