They refunded you $100k with few questions asked, and you hate them for it?
I’ve made a few expensive mistakes on AWS that were entirely my fault, and AWS has always refunded me for them.
I imagine if Amazon did implement “shut every down when I exceed my budget” there’d be a bunch of horror stories like “I got DDOSed and AWS shutdown all my EC2s and destroyed the data I accidentally wrote to ephemeral storage.”