Might it just be that people are buying from Temu because stuff at the mall is 10x as expensive and doesn’t even last all that longer nowadays? People can’t afford to pay 40€ for a T shirt.
As if everyone wear fast fashion from their local retail store for 20 years. Truth is many people are buying new clothes because they want new clothes and not because they break (just like many in HN buys new electronics even if their computer from 20 years still boots)
The fact that these clothes tend to be in the category of "doesn't last or made of plastic" (plus low human labour costs) is what makes them cheap enough to be possible for people to order/buy them in as large quantities.