Since when bitcoin became a gaming site or a trading site? Bitcoin is just used in those particular sites. Bitcoin is just like money in its own ways.
Complaining about bitcoin in what particular aspect? Come to think of it, why would anyone complain about bitcoin? Did anyone complained about fiat? What is the sense of complaining then?
In a newbies perspective that is what his understanding about bitcoin, I think he gambling site and not gaming by the way, and in a newbies perspective they always think as bitcoin as just gambling and trading site and they always do that kind of things using bitcoin and they are not thinking out of the box and see it on their own perspective that bitcoin is not an ordinary currency they can mess with and if they do it properly they can earn good amount of income with it.