In my opinion, that most important problem is that we should not have allowed our production to be outsourced offshore.
The problem is that we do not make TVs, cellphones, computers, etc., in the US any more.
The only point of tariffs is to use them as a theoretical threat.
You threaten companies that if they leave the US to produce with cheaper labor, then they won't be allowed free access to our markets any more when they want to sell their products. Otherwise, tariffs are really bad for everyone.
So what Trump has to do is first get new production companies started in the US.
And only then impose tariffs.