In the sense that it has a defining point where it got crap and therefore I no longer believe it to exist? Yes. Yes it is.
(That point, by the way, is when they decided that all of the expanded universe books were no longer canon and therefore attempted to erase my childhood. Well suck it, George Lucas, because for me there are three films and a bunch of fair to pretty good novels and that’s all I need.)
I don’t want to live in a world in which Grand Admiral Thrawn never existed, basically