I am angry for what happened at your open letter. It is the strongest evidence of what you were warning about in that same post.
You were talking about the creation of a downvoting culture and then... boom, you receive some downvotes of people that simply didn't like what you were saying.
You didn't break any rule, you didn't plagiarize or scam someone. You just expressed some important thoughts about the health of this ecosystem, with the best will to bring people together to improve the interactions in Steemit.
That's how they thank your contribution, your healthy disposition. If they treat that way the best members here, I really don't understand what they have in mind for the future of this platform.