I listened to Sirota's Meltdown podcast, and it's not a direct attack on Obama. It's more about the ins and outs of how everyone involved in the crisis handled it. We already knew Obama appointed Wall Street bankers in the Treasury, turned down proposals to directly fund homeowners, and didn't charge anyone involved.
I don't think Sirota targeted Obama - he more exposes the lack of government oversight in Wall Street's corruption. We were robbed and our government didn't support us, and we voted for Obama because he promised hope and change, but we got more of the same one-sided financial favoritism.
Personally, I think Clinton, Bush, and Obama gave us Trump.