It's like if foxnews ran a story "What happened to my 13 year old daughter after consuming establishment media or democratic speeches". And then daughter turned out to hit every checklist of a "leftist" fanatic caricature. Or christian publications that would publish "stories" about how hollywood movies or rock 'n roll turned their child gay or in devil worshippers.
A lot of these "stories" involving children are even manufacture ( in order to write an article ) or sought out specifically. Just like the UVA rape story.
I can assure you, as someone who has multiple family members get sucked up into this ideology, this is how it happens.
but, the story does give a feeling of being too perfect. I doubt they would just make things up, but it feels likely that a lot of liberty was taken with making it all fit really nicely.
Again all that said, the points within it, are true and valid, the story at plot level is very realistic and is happening all the time.
The writer needs this to be a story about descent into a seedy underbelly, slowly becoming more and more unreachable by those around him, followed by a come to Jesus moment. Hell, it even has a clean three act structure and villain (a dangerous influence that Mom and Dad don't understand and are powerless to stop).
It can't be a story about an isolated kid that memed too hard and needed to be see with his own eyes how retarded the people in the deep end are IRL.