I was okay with missing out on fast free shipping unless I paid $100/year, because I could still get slow free shipping. But now that I don't get the best price on a given product without Prime, shopping there feels like a bad value. The competition competes well on price now without extracting an annual fee.
As of a few weeks ago my Amazon rewards card gives me lower rewards than if I paid for Prime, so I'm looking for a new card. I'd chosen a card without an annual fee for a reason.
For the first 15 years Amazon trained me to buy online from one place. But in the last 5 it trained me off of that behavior. I have the added motivation to reject Amazon because of its treatment of employees and its business practices, but as just a customer and not an activist it's become a bad deal anyway.