I think the 'dislike' comes more from his timing, rather than the content, of his articles per se. He seems to always pop up with a 'cage rattler' just before the end of a transfer window, or just after a run of disappointing results, or just after a clutch of player leaving rumours.
Maybe it's just coincidence. Or maybe its completely connected. Or maybe he's just doing his job of laying down click-bait. Who knows....
Either way, I suspect we wouldn't have seen an Ashton article, accurate or otherwise, about Koeman shaking his head at an U21 game if we'd had a better start to the season and no agitated player rumours.
But that's what he's paid to do and he does it well.