Its not just about the players though is it Vish ? Did you watch the 1990 villa game ?
Fergie left a well oiled machine and I would not write off united just yet. Dalglish left a train crash.
To be honest I don't remember but in any case i don't conclude over one match, especially to define a freefall over more than 20 years. Any team can have an off day, a experienced expert as you claim yourself to be should know that. Do you remember that KD team did beat the would be champions United comprehensively 4-1 and Benitez LFC did it at Old Trafford, does that made United crap...over 6 months?