So yeah, i'm sure there's horrible ones and troubles happen, but i wouldn't make that a generality just like that.
However, along the increasing rejections of visa for highly talented people + more and more stories like this one are signaling a very very bad trend.
I have noticed both among my peers: visa rejections for founders with funding from US investors, befriended founders who are being pulled into second screening every time they enter the country, my co-founder being rejected to enter the country once and now also being pulled into second screening every time (despite having an O1 visa). It's degrading and simply horrifying. And most definitely not a good trend for the US.
This is a very emotional topic. I get sad and angry every time I read or hear a similar story.