It's almost certainly due to your opening statement "This is a garbage non-article."

Over 100 people have upvoted this story, and thus it's likely that they think that this is an article worth reading and recommending. You are indirectly telling them that their judgement is similarly "garbage", and they are reacting with downvotes. The contents of your objections seem reasonable to me, but if your goal is productive discourse, the overall tone of your comment off-putting. You'd probably get a better response if you found a way to offer improvements to the article without offending those who liked it.