Every web application does all of those terrible things? Your hyperbole is a bit extreme. Even if it is a very high percentage, say 90%, we are still left with

Every web application does all of those terrible things? Your hyperbole is a bit extreme. Even if it is a very high percentage, say 90%, we are still left with millions of high quality applications. You may have to do some work to find them, but it's no apocalypse. Whenever participation in some dynamic becomes immensely widespread (in this case, building web apps) the average quality of each instance always drops. This is a well understood phenomenon that is not unique to web applications.