I think a good start would be to appoint eccentric people with no experience and no knowledge to run the country
Then destabilize the currency and the capital markets so that manufacturers are disincentivized to invest.
Go to war with the education system, and the research universities over, trivial stuff like bathrooms, so that the place where engineers and scientists are trained go downhill
Screw up the supply chain of any manufacturer that needs to import raw materials or components.
Provoke all of your close friends into retaliatory tariffs so that even on the off chance that you make something nice, nobody wants to buy it at an inflated price.
That should do the trick