Yes. Some polyester products are better than others when it comes to shedding microplastic, but I guess at the end of the day it'll end up in a landfill anyway. The cotton will decompose, and I think I am also more likely to repair my cotton clothing.
I'm struggling a lot to find clothes where I'm satisfied with the quality. I try to avoid fast fashion and cheap products, but I also prefer buying clothes in stores rather than online. It's a market that's extremely hard to navigate, more often than not I'm underwhelmed by the quality, and just finding something that you can be reasonably sure wasn't produced in a sweatshop is challenging as hell.
My god do I hate this industry.