Ollie Watkins had scored a hat-trick before the end of the first half, with Jack Grealish grabbing a brace and John McGinn and Ross Barkley both scoring via deflections.
Shearer has now questioned the tactics of Liverpool and their high defensive line, and pointed out that they failed to put pressure on the ball which allowed their opponents to score so many goals.
Speaking on Match of the Day 2 , Shearer said: “They do it and when they have done it really, really well, it’s because they have pressed people, squeezed people and Jurgen Klopp has said it is high risk.
“It’s without doubt high risk when there is no pressure on the ball. You can’t play a high line and have runners in behind like that. There is so much space to run into.
“They are two or three yards inside their half, there is no pressure on the ball. Villa switch it to the left-hand side and it was happening all game, time and time again. Obviously, Villa had worked on it.
“You cannot play a high line when someone has that much time on the ball because you will get killed and Villa did it perfectly.
“It could have and should have been nine, 10 or 11 if Villa had took their chances.
“No wonder he (Klopp) is angry. You cannot do it when there is no press and no one is working hard, when you are giving people time on the ball to look up and get the ball forward.”
Klopp refused to blame the performance of Adrian after the match, deciding to call out the entire team for the six goals that the Spaniard was not directly at fault.
He said: “The first goal was not good but I don’t think he had anything to do with the other goals. We didn’t help him tonight. He is a really good goalie.
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“Last year we played 11 games with him and won pretty much all. Tonight our goalie was not the problem. The reaction to the first goal was not his problem, it was our problem.
“It is not often I have seen games like this. I am old enough to know strange things can happen in football.
“You could see in moments that in challenges Aston Villa wanted it more and that is something I saw and I don’t like.”