How would you define worse ever result. I agree losing a playoff final changed my view on football more than a cr*ppy fa cup game did.
Why does anything have to be “worst ever” or “best ever” even?
Results are either good (at the time) or bad (at the time). Or even in retrospect.
Losing 3-1 to Man United years ago seemed nothing more than expected. But in retrospect the penalty by Baines affected our goal difference which helped keep us up.
Drawing against someone when we should have won could have disastrous effects later.
What I do know is that being the losing party to a “Cup shock” is a long way from being our worst result ever.