I do admit that the books fell in quality for awhile. Book seven wasn't great, and book eight was almost just bad. Nine wasn't terrible, though, and I honestly thought books ten and eleven were very good. I was excited while reading Knife of Dreams, and that's the mark of a good book; one that excites you.
Of course people will have different opinions. If you think that every book after five was terrible, then you think that. If you hate the entire series, then fine. That's your opinion. But don't speak for everyone else, and remember that regardless of whether or not the books were good, a man died. He brought happiness to a great many people, even if it wasn't everyone.
I do hope his wife is ok.