I don't think anybody hates AWS as a technology. It's mostly the rent-seeking (pricing almost-free bandwidth to an egregious level, nickel and diming users through fractional pricing calculations that are about as transparent as the US health insurance billing, predatory B2B vendor lock-in practices) that gets on people's nerves.

When MBA (and YC startup) schools teach to build product with a "high switching cost", they do not have consumer's (in this case the developers) interests in mind.

The other issue is that outside of the core offerings (S3, EC2/Lambdas, the logging and queuing services), everything else seems to be in a perpetual state of beta with products shipped by interns. The situation is not as bad as Cloudflare but the bar's on the ground. Pre-LLM, services like Cognito caused developers no end of pain and suffering. Poor documentation, buggy products opaque console UIs, there's no end to complaints when it comes to AWS. If their services were designed well, then companies like Vercel and Heroku shouldn't exist at all.

And what's worse, with all of their efforts at squeezing customers, they still pay the worst of out of all of the big techs for non-senior leadership day to day engineering ICs. At least with Facebook there's commensurate pay. It's like Amazon took a look at Asian "996" culture and figured that if it works for their warehouse staff it should be good for the engineering folks too.