I know that is hard but what is going on is very likely something that can't be reversed. After all Trump still has something like 96% of the term left and the connections are already breaking apart left and right. Not to mention that his ideas will surely outlive him. What means that Europe will fill in the divorce papers and that will be it. We will see you around but the nature of the relationship will evidently change.
You are correct that this shit show is just getting started. I think much really depends on how long it lasts. I think the only thing most American voters will notice is if all these tariffs lead to inflation (I'm certain they will), a recession due to counter tariffs (US exports will eventually shrink), and a decline in the stock market.
This won't happen overnight, as supply chains and manufacturing capacity take time to establish (years even) but in six months impacts should start to hit pretty hard although the timing is confounded a bit by Trump's on again/off again instability on the tariff front.
However, as you imply, if other countries undertake the huge investment to change their supply chains and manufacturing capacity away from dependence on the US, they probably won't go back. China is probably loving all this as well as they will find new markets for their goods to fill the gap.
I'm still holding out a small hope that American's will wake up to Trump's b.s. when all this happens. If he mucks up medicare/medicaid and social security on the home front that would also help speed things along.
If Trump is still popular six to twelve months from now, I think the new situation will become entrenched. The mid-terms might be too late.
I'm also curious to see what happens when all these court rulings that are currently not going Trump's way hit the Supreme Court. If they slavishly do Trump's bidding the situation will get dire.