A lesson I learned working in film:
Dumb to make a thoughtless/dismissive/sweeping remark re: some complex piece of pop culture to someone I find out worked hard on that very thing.
Even worse, they had done some of the work on it that I liked! Now I lost an opportunity to learn!
I try to always assume the creator is listening; be critical without being a dick.
Many creative folks love to critically dissect work, especially their own.
I try to start from a place of respect for the effort.