Wouldn’t your comment equally apply to being a small business owner (let’s say blacksmith) under feudalism? As a good blacksmith, you will earn more clients and prestige, while poor blacksmiths won’t get repeat business. You might be able to expand your forge and hire more people to do the tedious work of making chainmail or whatever.

I don’t know that anyone can ever provide an “objective” source on capitalism. Anyone who writes on the topic has inherent biases. Here are a few: https://www.amazon.com/Democracy-at-Work-Cure-Capitalism/dp/1608462471

https://www.amazon.com/Slow-Down-Manifesto-KOHEI-SAITO/dp/1662602723

https://www.chelseagreen.com/product/doughnut-economics-paperback/

https://www.amazon.com/What-Wrong-Capitalism-Ruchir-Sharma/dp/1668008262

https://www.amazon.com/There-Are-No-Accidents-Disaster_Who/dp/1982129689

https://www.amazon.com/Deaths-Despair-Future-Capitalism-Anne/dp/0691217076

That’s just the government though, similar to how a lot of the systems in the US still run on COBOL (including the IRS).