This was my thought a well. Just using the internet at all guarantees that we’re supporting Amazon, Google, and Microsoft because they host most of the content.

This conundrum points back to our need to have agency, and something OP will/should address. One way to lower anxiety is to understand where we have personal agency and where we don’t. No matter how hard or how long I beat on a brick wall with my bare hands I will not damage it, only tire and damage myself. This isn’t limited to man made/capitalism. I also cannot swim across an ocean. Recognizing when I can make a difference and accepting my personal limits allows me to focus my goals around things where I will succeed or produce results. They may be (globally) small, but they affect me and my community in a meaningful way. I might even use that brick wall to provide a brace for leverage or the water in the ocean for salt or brackish irrigation. Expending energy that I know will not affect change only lets them beat me twice.

I used to believe this stat too, then I looked it up. AWS is about 12.5% of their income. Online retail is about 50%. Your point still stands though, you can't easily avoid Amazon's revenue stream.

https://addons.mozilla.org/en-US/firefox/addon/cloud-firewall/

But honestly I don't AWS is as bad as their retail side to there employees.