I have degrees in both econ and poli sci and have worked at multiple Fortune 500 companies as a high level data analyst / software dev / db admin.
I got those degrees during the GWOT and GFC, and argued against bailouts without jailing those responsible...
...and got called a conspiracy theorist by a Poli Sci professor when I wrote a paper on 'conflict goods' about the US military guarding opium fields in Afghanistan.
Despite me citing my sources and even linking to an on the ground Fox News interview with a soldier who just straight up said that is what his unit was doing.
I also have studied the history of the industries I worked in, as well as just human history in general, in my spare time.
... I have also been homeless for a year or two.
I have lived a life of the extremes most people only ever come close to one of, stuffy and cocky corpo wealth and entitlement and social status jockeying mind games, and immense deprivation, near constant direct physical and mental trauma.
But if you would like maybe a more formal argument that capitalism objectively is raping the planet to death:
Here's London's Society of Actuaries, they've run the numbers and determined that our capitalism-driven, collective inability to stop climate change...
... is going to destroy the world, and thus future GDP projections.
My own guesstimate models point at something like 1 to 3 billion people dying in the next 25 years from the chaos that will result from increasingly extreme climate and climate disasters.
But those are roughly in line with more updated versions of MIT's old World 3 / Limits to Growth model.
tl:dr;
Why do I feel this extreme way?
Because I know what I am talking about, theoretically, practically and personally.