Yes I completely agree actually, I've been using Amplify to prototype UI quite well but my plan is to switch to using Postgraphile (or maybe Hasura, I haven't decided yet) + Cognito to replace the backend - primarily so I can use a relational database that isn't Aurora Serverless. I do feel like they've made good progress on the project in recent months, but it really needs another good year of work on it before I'd consider it cohesive enough to stick with.