Sometimes DYOR isn't enough if no one is scammed (yet) or there aren't any people who found scam website and make thread/article about it. It's especially true for scam website which recently created.
That's right.
However, apparently in this case, OP has not done any due diligence step whatsoever. No question asked, no search made, and with a 2 BTC transaction. And on a site which has been talked about over and again as questionable and shady.
As regards a new and has yet to be reviewed site, I guess basic prudence tells a newbie to avoid using a service which doesn't have any reputation yet. If one is to tumble Bitcoin, a newbie should stick to the one which has already established itself as trustworthy more or less rather than on a site which has yet to earn even a single star. Especially with a significant amount.
@OP sorry for your lost mate and this one will charge up to experience. Losing almost 20k usd is really hard to accept in my part.
Links about official site of Chipmixer site is already given above, theres no need to repeat.