Actually, the problem right now is the complete lack of Keynesian style fiscal stimulus. China and USA already did their part and they will do more.

I am mostly talking about Europe. The Eurozone basically makes fiscal stimulus impractical even though keeping it alive absolutely requires it.

Every time I hear people talk about Keynesian economics ruining everything I am thinking "no such thing happened". QE fills bank reserves, interest rates drop on their own, banks never lend out money, stock market goes up without any actual investment, there is unemployment caused by the macroeconomic structure of the economy, investors are flooding governments with their money by buying bonds, inflation remains stubbornly low, trump cuts corporate taxes.

The fact that things are reversing in the US is a good sign for the US economy as a whole. Biden is actually doing the fiscal stimulus that the economy was asking for decades. There may be a short term crash in the future but it's only going to get rid of the unproductive part of the economy to make everything ready for more long term growth.

Meanwhile Europe will be stuck forever if the Eurozone doesn't resolve its structural problems.