Now if you've been here a while you could easily take what's coming the wrong way, so let me just say that what I am about to say, I say in all earnestness.
Why worry about it? It accomplishes nothing. Unless your goal is to increase your stress levels and you really enjoy that frustrating feeling of not being able to do anything about whatever it is that is bothering your senses.
I'm not saying not to wonder why people are what they are or do what they do, that's infinitely fascinating, but actually giving it weight that has any bearing whatsoever in your real life, to me, is of no value. You know what you are, what you're not, what you'd like to be and what you're willing to do to get there. Why does a strangers opinion, someone who you will most likely never meet in person, matter at all?
Put your back to it and move on. Which is not saying to ignore it, there's always something, some reason or lesson, but you don't have to let it have a life beyond what it really is: a strangers opinion on the internet.