Disclaimer: This is an official answer (at least, as much as I can make it) because having an opinion is hard and I'm lazy.
You wrote an answer that took from multiple sources, and provided attribution. This is allowed.
You accepted an answer of your choosing. That's your right; not even moderators have the authority to change it.
I've had some sour feedback about it and it seems one of the other answerers resented that.
For one, as it was me, I would prefer to be called by name, not some vague wording. Especially if it's quite clear whom you're talking about (*1). Equaly important, unlike you seam to belive, my remark wasn't in any way related to me writing an answer as well. I may ...