Free stuff is awesome. It's one of the perks of writing about clothing, sometimes you get things sent to you for review or as something to keep in mind for future stories. That doesn't mean you're obligated to Instagram it, tweet how awesome it is, or anything like that. An item or brand could totally suck, and that's perfectly fine. As a courtesy, just thank the people that sent it to you, evaluate if it's something you actually like, and move on with your life.