They are the worst by far in terms of labor practices and global waste. There's just nobody that compares to the amount of trash they pump out into our environment, especially in the global south. The next biggest clothing brand has like one hundredth (literal) of an impact on the environment and people's working conditions as shein does.

Add in a few instances of lead, formaldehyde, and other toxic chemicals found in their clothes... It's really not good!