Because it’s unsustainable and actively degenerates everything in its environment in pursuit of an insatiable need for capital growth.
Saying capitalism isn’t that bad is like saying early stage cancer isn’t that bad. It doesn’t change the nature of the cancer and what it will become unabated.
Going with the cancer metaphor, what does “late-stage” capitalism look like? How do we know that it will happen? Are there any other possible timelines that has something resembling capitalism but is not terrible? Capitalism is a pretty broad term that can describe all types of economies from the american gilded age to modern social democracies, and while I would certainly consider various forms of extreme capitalism to be cancerous to a functioning society, are they truly representative of all types of capitalist systems?
Edit: spelling
