On both your Twitter and Facebook accounts you posted: "Comments and upvotes increase our chances of getting selected!" You may not actually have used sockpuppets, but soliciting upvotes to create an artificial buzz around your product is still shady - and it definitely doesn't look good that most of the top-level comments to your Apply HN submission are from those accounts.

Looking through your submissions and replies to your comments, I don't see many comments I would consider "quite rude". I think you're being defensive because someone accused you of acting in bad faith regarding your Apply HN submission, and you posted this thread in an attempt to counter what you feel might be negative PR. You can't control the way people reply to your submissions or comments - the only thing you can do is avoid making a bad situation worse by complaining about it.