As other have pointed out, Bitcoin relies on a larger and larger usage of energy by design. You could to a more energy-efficient Netflix, but you cannot do a more energy-efficient Bitcoin.
It's actually the opposite: its energy usage shrinks and shrinks, by design. Every 210,000 blocks (~4 years), the block reward (mining subsidy) drops in half. At the limit, it approaches zero, and the network can only afford to spend as much on energy as users pay in transaction fees.
Admittedly, "the limit" is quite a few years off, and there's a big subsidy still. I'm surprised we haven't seen taxing authorities go after block rewards specifically - they're why miners are currently willing to spend 10~20x on energy vs what users pay them for transactions.
(Ideally, this would be a global tax and not too high, since reducing mining too much would compromise security)