You chose to take something good and put a negative spin on it. Rather than let people enjoy something that doesn't hurt anyone, that isn't excessively indulgent etc, you chose to shit on it, to ruin it, for no other reason than you wanted to. That, is base harassment; you didn't like it, so you had to insult the content and tumblr users and make sure everyone knew how dumb they really were. You have no actual good reason to call them out, because it doesn't hurt anyone or cause any harm, especially in the way you did, as really, it's the inflammatory way you presented your point of view that draws ire. Not to mention that calling them out here changes nothing, no good whatsoever. And so people are calling you out on that. The difference is, they're calling you out for hurtful behaviour, whereas you are asserting your own (hurtful) point of view. Don't try to act as if both sides are the same here.

So, you feel belittled is it? Well, yeah, children often do when someone chastises them for bad behaviour.