[at_a_remove]

If you really care that much about fallacies, you should at least pick the correct one. In this case, what you were really looking for is "Tu quoque."

Note: I have provided an example by saying this.

[RubenvanE]

You're right, but technically tu quogue is a type of ad hominem attack. So OP used an ad hominem tu quoque fallacy to discredit the author.

Even though this might not be the strongest argument from a purely logic point of view, it can still be a valid critique on the author.