Warnock pointed to a penalty claim early in the second half when Alan Smith felled Alassane N'Diaye, which was waved away by ref Andy D'Urso.
"Smithy was all over Alassane and anywhere else on the pitch that's a foul, but that ref has never given me much over the years.
"We never really gave ourselves a chance. The goals were a disgrace at this level but you get punished by good players."
D'Urso was alleged to have replied "Tell him to piss off!"
But don't quote us on that - it's "off the record".