You used a comma in your comment in the same manner as the individual you're criticizing. Further, you utilized meaningless memetic neologistic rhetoric such as "low-key." People didn't really say that so widely until the last few years, which means it's a trend, not some revolutionary word which describes something people should know about.

I really don't know if you should be criticizing this article, because after reading it, it's just fine. The content matters so much more, and the writing doesn't get in the way of it.

But I can understand if you desire to hold others to arbitrary rules of style which don't really matter. I guess.