I think most designers welcome negative feedback, we just insist on being treated with respect while being given said feedback. Calling something terrible, or your original comment which simply says you think it's bad without expanding, those are extremely negative ways of providing constructive criticism and I think you probably know that.

Maybe you're having a bad day, but that doesn't mean you can act like a dick and break this sites rules. Would you use those words or talk that way in a design review IRL? I highly doubt it.