If you really care, reach out directly to the merchants you buy from. Tell them you used to be a loyal customer, but you won't buy from them again until they stop carrying products made in China. Get your friends and coworkers to do the same, and keep the pressure on. If they go for it, follow through by rewarding them with your loyalty, and broadcast that win as publicly as possible. Talk about it, hashtag it, whatever. Organize.
Changing individual consumption habits rarely amounts to much more than virtue signalling.
And don't toss your existing stuff. You already paid for it, so it's not helping China anymore, and throwing it away doesn't hurt them. If anything, selling it to someone else reduces demand for new products (by exactly 1 unit).
Gandhi protested against the British by spinning his own fabric, making his own shoes, and being completely independent. It made no difference to the British companies, but it sent a powerful message to the nation that Indians can be independent.
Do not underestimate or discourage people from doing what they principally object, even if practically it makes no sense or has no objective benefit.