This is just a bad argument. You aren't even providing data on how much traffic was impeded, which is precisely what the law intended. You've also just ignored all of my other objections to your other bad arguments.
Note that the fact that VPN use increased actually demonstrates that the law is working. If the law were not working then people would not need a VPN. Thus the law disincentivized the illegal activity by increasing the cost associated with it, and some people (we have no idea how many, given your numbers) chose to accept that increased cost for the sake of the activity.
Legislation is always a turn-based game. VPN use obviously needs to be addressed as well, where VPN companies should not assist minors in accessing illegal content.
The increase in VPN traffic doesn't demonstrate the law is working, it demonstrates that people are still looking at the kinds of things you were trying to stop them from looking at, just merely getting it from a different source or circumnavigating the intent of the law.
That'd be like saying "We saw huge number of people drinking bud light, so we're going to put this barrier in place that makes it much more difficult to access bud light"
And then upon seeing that they all merely switched to Coors light but are still consuming beer at the same rates, saying "See it worked, they're not drinking as much bud light"
There is no way to "address the VPN use" nor is there any practical way to "address getting the content from a Euro site instead of an American one".
Iran, Russia, China, Turkey, and Egypt have all tried to "address the VPN usage". Despite having some of the tightest controls on internet traffic in the world, they failed.
- VPN tech evolves faster than government censorship mechanisms
- Tor bridges used as a stand-alone (or in conjunction with a VPN) make it nearly indecipherable
- VPN providers in other countries operate outside the jurisdiction of the censoring government (The US can't for a Czech provider to do anything, for the same reason Iran can't force a US vpn provider to do anything)