Absolutely nothing about it has gone wrong.
They have collected some personal data from law abiding pornography consumers: obvious perverts who should know better anyway. If their information gets released it will be their own fault. Some other stuff got hidden, but that's no problem as the BBC will tell you anything that you need to know anyway.
They can, and will, readily ban VPNs later, since those have no legitimate purpose for individuals, and will only be allowed for licensed operators like banks, hospitals, and defence manufacturers.
If you think this is sarcasm you haven't been paying attention to what the people pushing these laws actually say.