Ugh... I am going to quit crypto forever. This wasn't even MY money, it was for a friend who was just wanting to buy a miner.
Very sad to hear that but that's something childish. Crypto has nothing to do with this case. It's your fault of course.
It was being released to the prior agreed upon address.
If the amount was released to the agreed address and there was a confirmation from your account, I don't think you can blame on OgNasty for this though OgNasty could have done some more investigation as an experienced escrow service provider, you can't blame him at all. It's your responsibility to secure your account.