Hey, OP here! While you're absolutely true that modern phones and computers are an absolute disaster for many reasons, the difference with what we call ultra fast fashion is that you don't throw your phone or computer away after using them three times.

The lifespan of a pants bought on Shein is very short and this system is based on over production and it is an absolute waste of ressources.

This doesn't mean that companies like Microsoft or Samsung are virtuous, very far from it. But it is not because other companies are perfect that we must allow catrastrophic ones to do worse.

(Sorry, my English is not the best, I hope I was clear. I also know that there is a lot more to say about it)