We used the ansible module at work but we had to fork it internally and extend it heavily. I would suggest you try https://github.com/mrparkers/terraform-provider-keycloak instead, because terraform cleans up after itself (it deletes resources that you deleted from code, rather than leaving them behind) and terraform is also much faster, because it auto-parallelizes according to the dependency graph. The terraform provider also seems much better maintained than the ansible module.

And yes, the keycloak api is inconsistent.