Wife left the faith citing SDA false doctrines? Is she right in doing so?

My wife has left adventism and has decided to go to a non-denominational Sunday church. Her issues with the church is the church "leaders" making EG White authoritative. She has denounced the Sabbath stating that the new covenant is through Christ and the old covenant is done away with. We've been to counseling sessions and her new beliefs are still evident with her leaving the church. I've made peace with it, we don't have any kids yet, but if we do, she doesn't want them to go to an SDA church or more so, step foot into one. Has anyone experienced this from a significant other and what was the outcome.