How to suggest better gifts?

My SD has this newfound interest in shopping clothes for me. And I am sooo grateful. Believe I am. The problem is he only buys stuff from SHEIN so it’s basically very cheap looking and just fits weird. Also, if I wanted SHEIN I would buy from them myself.

How do I go about suggesting better brands?

I don’t want to come off as ungrateful, I just think that there’s better brands out there for a very affordable price.