Do not forget the big companies like Coca Cola, Nestlé etc. They are also sucking up the/your (cheap) ground water to sell it back to you in the supermarkets for 1000% profit. And they do not care about the environment either. And they're already doing it way longer than datacenters owners and they also did not stop during droughts.
It's always not just one to blame, it's usually the sum of the culprits.