Bernanke has his fingerprints on every large central banks' response in the wake of the 2008 Global Financial Crisis. He flooded the system with liquidity to prevent what he observed in the Great Depression. Was he successful? Yes. We didn't suffer from a recession anywhere near the magnitude of the depression. Did you like how he did it and what happened as a result? I'm guessing you didn't.[1]

Part of the fun of economic and monetary history is following the umpteen competing explanations for recessions and bubbles and piecing together a mosaic of all that seems to make sense. Bystanders have the luxury of not writing those papers unlike academics, who often chain themselves to their own work/school of thought.

Every monetary theory is based on a very limited set of observations. Policies borne out of those theories are even more scarce. I don't expect anyone to be right or wrong all the time. In my opinion, the best way to understand economics is to have a base set of principles and be theoretically promiscuous.

[1] I tend to be a free market fundamentalist so I didn't like it either. That doesn't mean it didn't work.