People are frustrated that you insist on your 'opinion' being valid when the position you hold is void of a thought. It's actually a lack of an opinion. It's a tantrum. You have eyes, you have the time and perhaps even the interest to look, and yet you put your head in a sand and claim that the darkness you see gives you enough data to claim whether something has artistic merit or not.
The frustration comes from witnessing the blatant and confident ignorance, not from whether you 'like' or 'dislike' something.