"I can feel angry, but write in a way that no one would notice"
Judging by your post, it's quite clear you are angry.
Also saying you did not offend someone or insult anyone is your opinion. You may have.
Yes I called you a fool, and said that the wording that was used was "shitty" if you want me to change it I can. I'll say the wording you used came across as judgemental and rude, while being masked as trying to be informative, but at the same time coming off as patronising.
As for the fool thing, I think it's foolish to tell someone they need to work on their game, because they have added constructive criticism to someone else's work. Especially when their work themselves need to be looked at too.