In 2020 the highest amount of new liquidity was introduced into global markets in HISTORY.
Couple that with a once in a lifetime collapse of the international supply chain and you get rampant inflation and devaluation of currency.
This is macro economics 101. Either of those events would shock the system for years, couple them together and you're fucked sideways.
The toothpaste went out of the tube when covid hit and countries over corrected trying to starve off economic collapse. In hindsight the US and, to be fair, virtually every other major country went too far, causing the economic conditions we see today. The spigot for all this was turned on under Trump, not Biden. But any president in that situation in 2020 would have done the same thing as other global leaders did.
I don't particularly like Biden (or Trump) but this is basic economics and the result of the shitshow that was Covid.