Buying from fast fashion brands

Is it unethical for me to purchase clothes from fast fashion brands like primark if i continue to rewear the clothes for years after that instead of buying new ones?

I have always taken care not to buy from things like shein and temu that obviously arent ethical but recently i found out that primark is also very unethical (Yes i am aware i should have figured this out sooner) So is it unethical for me to buy the clothes from there even though im not using it as fast fashion?