"Stop buying things from [x]" probably hasn't been an effective mantra for several decades. The U.S., E.U., China, Japan, and other nations are all intractably linked in the global supply chain economy.
Just because it want effective before doesn’t mean it won’t be effective in the future. It’s never been easier to buy local than it is now. It’s never been easier to organize boycotts than it is now.
Better not do anything with computers then. China is completely integrated in global supply chains, what you want is probably impossible at this point without giving up whole swathes of industry
Have you lived in China? Your suggestion, if taken seriously by a lot of people, would just further harm ordinary Chinese people who are already being harmed by a parasitic government over which they have no control.