The article in question doesn't state that meditation was a cause of their problems, but pretty obviously details that people coming to meditation looking for ways to improve their lifestyle, instead began down a road to a much worse place.
While it might be unsurprising that meditation did not provide direct benefits to mind or body, it also failed to insulate or deflect these people away from new misery.
It's interesting to learn that the people described in the article had uncovered unsettling realities about themselves while meditating.
Knowing what I know about many people, uncompromising introspection is not something everyone would be comfortable with. Some people are jerks. Some people have their head in the clouds.
Grinding one's life to a halt, and taking a hard look in the mirror, is bound to derail an unrealistic world view now and again. But if, on the other side of an unceremonious introduction to cold reality, awaits absolutely no way to fix profound disappointment...
What then?