It’s not possible for a single average consumer to support domestic industry on their narrow shoulders. It typically takes some sort of collective action, often in the form of government trade policy.
It's a fair point to make, but doesn't mean that OP shouldn't be doing their part by buying domestically if they really hate that some products get manufactured in another country. If everyone who complained about this issue decides to only buy domestically the domestic market would be much stronger.
At the "buy all American", I disagree with your point that I could possibly source everything in my house from the United States even if I had a million dollars - and if I could, though it would make me feel better, it doesn't change the macro fact.