I felt good about buying cotton tees which need less laundry due to hydrophobic and silver ion coatings. But they contain a bit of lycra. And they are hard to recycle. What should I buy instead?

Maybe could consider hemp clothes? Do your own research though as this could be a terrible suggestion. Hopefully others will comment on the (in)correctness of this suggestion

And they told us it's all our fault by using plastic bags...

Microplastics aren't the only plastic related problem.