As far as this round of inflation, monetary supply arguments are a bit specious. The Fed's 'quantitative easing' (money printing goess brrrrr) is pretty trickle-down Reaganomics in practice, although they could have just printed monthly checks for average citizens instead of giving it all to large banks and corporations, who use it for things like stock buybacks.
A more plausible explanation is breakdown in the global supply chains and failure to build up resilient infrastructure domestically. Consider gasoline and diesel prices, which have knock-on effects in all transportation-related sectors (food delivery, goods delivery, commuter costs, etc.). In 2015 US crude oil exports were allowed for the first time since the early 1970s and at least one major refinery was closed. This has clearly impacted the supply of refined products in the USA:
"U.S. Fuel Exports Are Draining Domestic Diesel And Gasoline Supplies, May 2022"
https://oilprice.com/Latest-Energy-News/World-News/US-Fuel-E...
This is at least a simple concept: reduce supply when demand remains constant and prices will go up, aka inflation.
this is nonsense and has no basis in reality, as far as I know
Background (ABC): "The Fed has bought roughly $2.1 trillion of Treasurys and mortgage-backed securities since the pandemic intensified in March [2020] That has flooded many short-term lending markets with cash, making it easier for many banks to borrow."
https://www.bankingdive.com/news/federal-reserve-stock-buyba...
> "The Federal Reserve said the country's largest banks can resume stock buybacks in the first quarter of 2021 with certain limitations, after the central bank released the results of its first-ever "mid-cycle" stress tests Friday... JPMorgan Chase was the first bank to announce it would resume share repurchases. Just minutes after the Fed released stress test results, the bank announced its board approved a new share repurchase program of $30 billion."
It's not just the banks, the airlines did the same thing:
"Companies that binged on buybacks now seek bailouts from taxpayers, March 2020"
https://www.cnn.com/2020/03/24/business/bailout-buybacks-air...