[stavros]

I really (err, vehemently) disagree with this feedback.

> Your writing is not clear to me. Using the word “really” is extraneous.

What's not clear? He said the article helped him, it seems pretty clear to me. The "really" was for emphasis, which is fine.

> Using “I think” is also extraneous; I assumed these are your thoughts.

"I think" indicates the degree of certainty. The author is uncertain but deems it likely.

> As the author notes, replace “it” with “the article”, or better yet a specific quote or idea distilled from the article.

The previous sentence says "the article", and the next one says "it" to avoid repetition. Saying "the article" twice would be awkward.

Very odd feedback, given how obviously out of place the corrected sentence would look.