It’s exactly as long as it needed to be to explain everything it explained, and it is a completely dry comment with no real tone at all, the “rudeness” is of your own invention.

Ironically, “Firstly you could read user names before going off” is far ruder than anything I wrote. Also, you’re assuming I’m the one who downvoted you–have you considered that maybe your tone earned that from someone else, maybe?

Your tone is unnecessarily rude.

Unnecessarily long

Lol. “How dare you give me a comprehensive explanation of specifically what I asked about! Rude!” What is rude is being so shitty to someone that went out of their way to try and help you understand something, acting like it was a personal insult. How selfish and demanding of you.