I'm not sure the explanation is true. It basically says that "lots of people" invested in Ponzi schemes. That's usually not the case. Stock returns or dividends are based on the operating profits, not the balance from new investors. It would require that companies deliberately fake their financial statements, and while that probably happens, it's definitely not the explanation for why "everything" went to shit overall.
It's true that the low interest has caused people who have money to place them in investments and that this may have overinflated the value of some companies, or that the money is placed in more risky companies.
The second part is also true. Central banks are increasing the interest rates in an attempt to bring inflation down.
Overall, the idea is right that inflation, interest and investments are tied together, but it doesn't really explain why everything is going to shit.