Is thing a new conspiracy theory thing?
I seem to remember Ben Bernanke maintaining an apologetic stance for some time now.
“Regarding the Great Depression, … we did it. We’re very sorry. … We won’t do it again.” Ben Bernanke, November 8, 2002, in a speech given at “A Conference to Honor Milton Friedman … On the Occasion of His 90th Birthday.”
In 2002, Ben Bernanke, then a member of the Federal Reserve Board of Governors, acknowledged publicly what economists have long believed. The Federal Reserve’s mistakes contributed to the “worst economic disaster in American history” (Bernanke 2002).
https://www.federalreservehistory.org/essays/great_depressionThe first paragraph in the link you posted claims this is "surprising"? Is it really that much of a surprise considering Bernanke has been saying this since 2002?
Many have accused the fed of causing recessions/depressions by shrinking the money supply. Another criticism is the fed's tendency to raise rates at the wrong times, reducing economic growth and prosperity. Those are two negative arguments I've heard directed at the federal reserve's handling of monetary and economic policy.
I'm not certain if either of those remarks made against the fed qualify as conspiracy theories. There are many prominent businessman and economists who criticized the fed and its proposed rate hikes.