There needs to be clarification here that having a vision does not make you an evil person. We all have a vision here as writers and illustrators. But, part of your vision should include the humane treatment of any of your potential workers.
While Jeff Bezos himself doesn't walk around cracking a whip at his employees, the company he created and today profits off of is responsible. I need to make this as clear as possible, becoming a billionaire is not possible without mass exploitation of the working class. You need a massive amount of workers, working absurd hours, for little pay. It's an unfathomable amount of money that the mass majority will never even come close to achieving. Imagine how long it can take the average person to reach $1 million. Now do that again 1000 times. You cannot even reasonably spend that amount of money in a single lifetime. This is why we judge Bezos and other billionaires as harshly as we do. He hoards wealth and will never put it back into the economy. What's worse, he works no harder than a typical office worker (you can look up his daily routine, he's talked about it in interviews. It's really boring) and reaps in absurd amounts of money as his shares of Amazon increase in value. And it's easy enough for him to liquidate chunks of it when he needs it given the demand of Amazon stock. Meanwhile, his workers are breaking their asses, peeing in bottles, literally dying on the job (guy had a heart attack and was left there for 20 minutes) but GOD FORBID you take a bathroom break.
I can confirm the poor working conditions. A good friend of mine worked in one of their warehouses for a couple of years. He was literally doing the work of 2 people and was fantastic at his job. He got fired because he had 2 minutes of unclocked time on one occasion so he could use the bathroom.
Now, as for the "yet you continue to buy from them" argument. It's nearly impossible for many to avoid. If you're in a food desert, you probably rely on them to get groceries. Or often they're just the cheapest option. Or you don't have a car, so delivery is your only option and Amazon just happens to be the fastest. Moreso, Amazon makes majority of their money through AWS. So if you use Twitch, Netflix etc, you are still supporting them indirectly. To make this clear, participating in a structure of capitalism does not make you a hypocrite. Participation in the system is forced to survive.
tldr; a person with this amount of money and with a company as large as amazon is dangerous