End of the day, the letter is a provocative piece written by a provocateur. It's hard to be a provocateur in a large enterprise that explicitly self-identifies as the paper of record and an institution.

I don't follow this writer, but based on open letter (and the fact that the individual published an open resignation letter in itself), the individual sounds like someone who didn't function well in a work environment full of big egos. It's hard to swim upstream in that type of org.