Florian, I don't have angst against you, I am disappointed that your first response to being called out is to lie about what you said, and destroy the evidence.
But if I may offer a little advice, I think your problem lies in thinking of all the other italki users as one entity, rather than many many individuals.
Clearly a lot of people enjoyed your writing, and a lot of others were offended by some items.
We are not all the same as each other any more than any of us are the same as you.
We didn't all complain.
We aren't all intellectuals.
We aren't all simple minded.
We aren't all anything much except human.
If you are going to do more than the basics then you will have fans and detractors. You'll need to accept and live with that, or bring yourself down to the most basic level to avoid it.
I suspect from what others have posted here that you are better than that.
Maybe give it a day or so and then get back to what you do, being careful to avoid insults and generalisations, and try to grow a thicker skin for your own peace of mind.