What are your pain points with current BaaS solutions?

I'm building an opinionated domain-specific language for generating GraphQL APIs. You define your schema (models), authorization rules, and you can then extend it's functionality with JavaScript or Python.

I want to know about your pain points with existing BaaS solutions such as Firebase, AWS AppSync/Amplify, etc. so I solve them with the somain-specific language I'm building.

Thank you.