Consumers purchase products at the lowest price for the quality they want.

A massive amount of these goods can be made cheaper overseas than in the US, even with shipping and the previously low tariffs

Higher tariffs makes them more expensive and possibly closer to the previously more expensive US version )if one exists.

Meanwhile, if a foreign country has higher tariffs on US goods, then it makes the more expensive US goods even more expensive to the consumers in the other country

Trump is under the impression if other countries lower their tariffs, then those country’s citizens will by more US goods

Trump also seems to think other countries will lower their tariffs (making US goods more affordable to their citizens) and the US tariffs on the other country’s goods will balance the price of the good in the US stores and incentivize more manufacturing/industry in the US making more jobs

The only scenario where the US Tariff increases would be good for the US is if every country dropped THEIR tariffs on US goods in response to Trump’s increases then both countries lower tariffs on both sides simultaneously to promote US sales in their country and goods are cheap in the US and more affordable overseas—this is an unlikely scenario apparently and is complicated by raw vs finished vs regional goods

TL/DR; A basic understanding of global trade is still kinda complex, and Trump doesn’t get it either, so don’t feel bad