> We have 730+ days with 99.993% measured availability and we also escaped AWS region wide downtime that happened a week ago.
This is a very nice brag. Given they are using their ddos protection ingress via CloudFlare there is that dependancy, but in that case I can 100% agree than DNS and ingress can absolutely be a full time job. Running some microservices and a database absolutely is not. If your teams are constantly monitoring and adjusting them such as scaling, then the problem is the design. Not the hosting.
Unless you're a small company serving up billions of heavy requests an hour, I would put money on the bet AWS is overcharging you.