Normally you'd start with a very small tariff and increase that on a regular schedule over a few years so businesses in the whole supply chain can anticipate and adjust in a reasonable stable environment.
It's the opposite of declaring liberation day and chickening out repeatedly. Of course, doing the opposite of good policy also has the opposite result. Businesses are leaving USA. It's easier to produce in another country in a stable environment and import the final product, and pay tariffs on it, only once.