I know personally nothing about that journo but I can't see how the basic premise of the article is wrong. Koeman’s moved before the end of his contract multiple times to take "a step up" so it is a bit hypocritical of him to criticize Rom for the same. Particularly when Koeman himself said
Romelu will not have made the most of his career if he plays for Everton for the remainder of his career."
Just a very desperate attempt to get his two cents on the subject.