You're right, many of these are valid criticisms.
It's just that we've been having the identical arguments over and over for nearly ten years now. We're not advancing our understanding by re-hashing the same tired ideas.
Maybe I'll make a page with common responses to these arguments.
To use your example ... it's true that mining cryptocurrencies consumes a lot of energy. So do casinos. So does Facebook and Starbucks. So does manufacturing weapons.
The world's televisions consume a lot of energy.
Bank office buildings and the millions of bank workers who drive to work every day also use a lot of energy.
The question isn't how much energy a thing uses, it's how much value is derived per watt-hour of energy.
As a random example, mining does use more energy than some nations. Why this may be a good thing in a medium of exchange/value store tends to receive somewhat hand wavy responses. If you have a great answer then it might be helpful to share it.