It sounds like Appsembler's Tahoe product is what you're looking for, come checkout our free trail!: https://www.appsembler.com/tahoe/
FYI - I'm a software engineer and I work on the Tahoe/Open edX team.
Tahoe is a user-friendly platform that makes it really easy to spin up an open edX LMS. It aims to alleviate a lot of the issues that are mentioned on this thread about Open edX. Tahoe comes with out of the box tools to customize your LMS and provides great user support (docs/highly responsive customer success team).