Dismissing it as "both sideism" just allows mediocrity to thrive. On both sides, as it happens. It's an endless loop of "they're the problem, not us". Deflecting any responsibility and avoiding self-reflection. Nothing changes or improves as a result.
Why not demand better on all fronts? None of the aforementioned media are doing grade A work.
There are always bad apples, but you just need to look at how they are treated (e.g. whether they are rewarded or punished).