Ethical to buy second hand shein?

Hi guys i want someone’s input on this do we think it is necessarily ethical consumption to buy clothes from vinted that are clearly marked as Shein. I myself have and never will buy directly from them because i just dont want to support that kind of fast fashion so i’m wondering what do other people think in terms of the ethics as i know Shein have a history of very controversial labour practices. Thank you in advance any input is welcome.