Black has been placed in temporary charge at Villa until the end of the season following the sacking of Remi Garde last week.
The 52-year-old boss took the reins for the first time against Chelsea on Saturday, but he failed to inspire the Claret and Blues out of their slump.
Villa fell to a 4-0 defeat against the Blues, and Black’s team selection has received a great deal of criticism from Villa supporters.
However, Keys insists that the former Scotland international remains entirely blameless in Villa’s demise this season.
"Make no mistake, Villa is a fantastic football club," Black said. "How their fans deserve better than the dross that's being served up right now. No blame on Eric Black incidentally. Eric is another of the good guys, but he genuinely looked as though he was in shock after seeing that shower in Villa shirts fall apart again on Saturday."
Villa have been in abject form this campaign, and their performance against Chelsea continued their pattern of putting in awful showings in front of their own fans.
The Midlands side have won just three Premier League matches all campaign, and their relegation now appears inevitable.
Villa are currently stationed 15 points adrift of safety, with just six games remaining in their league season.