Extinction Rebellion

capitalism is ultimately doomed to fail because a system based on endless growth is inherently at odds with environmentalist goals.

Not necessarily.

The UK replaced it's declining industry with services. Services can provide economic growth without ever producing anything. Look at a derivatives trader - what is their actual environmental impact (ignore the underlying commodities)? Likely far less than a Chris King employee.

You're looking at it from the bias of someone who has issues with our current system and sees an increase in material goods as an inevitably of economic growth.
At the moment they go hand-in-hand, but they don't have to.