Don't forget folks - child and slave labour is of course horrendous and not acceptable. Unfortunately they aren't the only company whose products can be traced back to use of this. Which, their avid shoppers will gleefully post out to us all.
The likes of Shein and Temu encourage mass over consumption. They release at least double the amount of new lines that most high street providers do on a regular basis thus using FOMO to encourage over consumption even more. Their clothes are so cheap new that when people wear an item once or twice but think it's ok because they give it to charity , charities find it near on impossible to sell these items on as it's cheaper to buy new.
Justin Leconte on YouTube has some excellent well researched videos that explain way better than I can.
But yea - these organisations are particularly shit for society and the planet.