I can't see the code for context but it sounds to me that the reviewer is a bit pedantic, the comment: "If you have to pass a boolean as a flag, it is usually a code smell. It means that the function could be two separate functions." for example is fine, but this really doesn't matter 99% of the time, sometimes it enchances readability to pass the boolean flag to avoid context switching between just slight variants of a function when reading. Hearing the comments were longer than the code is not normally a great sign, at this stage I'd recommend a face to face conversation or a phonecall.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
I can't see the code for context but it sounds to me that the reviewer is a bit pedantic, the comment: "If you have to pass a boolean as a flag, it is usually a code smell. It means that the function could be two separate functions." for example is fine, but this really doesn't matter 99% of the time, sometimes it enchances readability to pass the boolean flag to avoid context switching between just slight variants of a function when reading. Hearing the comments were longer than the code is not normally a great sign, at this stage I'd recommend a face to face conversation or a phonecall.