I’m not an expert, merely someone who follows these things somewhat closely.
To get to your point about ‘is this what a recession looks like’, basically yes, exactly that. Now not all will look the same, this one merely had several negative feedback loops increasing the severity.
So short version: there are a lot of bad bank assets out there, ones that are being misrepresented to various places in regards to security. These things are basically housing loans that have been chopped up into thousands of pieces, an individual’s housing loan may be spread among dozens of securities, and sold.
Mortgage Backed Securities (which are what I will refer to as securities from here out) are basically a bundle of many fragments of loans. Any individual security will have a tiny percentage of an individual loan, with many loans compiled together. These are then sold to pension funds, various investment firms, etc. There is a risk, and a certain rate of default baked into them. That way if any individual loan defaults it has a small impact on many investors, instead of big impact on a few.
So these were sold, while the banks were deliberately deceptive about the risk, returns, and default rates. See that’s where sub prime loans come in. Not to go down that rabbit hole, but the short version is that banks knowingly and intentionally sold loans in such a way to increase their profit, knowing there was a higher risk due to them selling these shady loans. But they’re bundling them up and selling them as securities, so they are not on the hook when the default rates spike (as they did in 2007-8 when sub prime loans went bust big time).
This devastated many sectors of finance. Relaxed regulations had allowed places to overextend themselves, to lie and cheat the public, all in the name of short term profits. As the loans started to implode, the scale rippled. Places that had invested based on a set risk, for a set return, lost their shirts (why many pension funds got killed, California in particular was a big investor in these).
Fast forward a bit, and the money that greases the economy is dried up. Business loans are harder to get, many companies lost their cash funds, and as a result companies go out of business, cut back production, and lay off workers. Because the banks are in a mess of their own making the economy grinds to a halt. And because it is the banks access to capital, which might have otherwise have lessened the severity, you see the economy shedding upwards of 800k jobs a month.
Double the fun as banking is global, meaning that Europe, Japan, etc. all hit the same wall. Meaning that imports and exports dropped massively across the board, making recovery harder.