I agree. This 'crumbling' is due to problems in leadership in the church. It seems they either promote or allow changes in doctrine, praise & worship, & drawing back from traditional preaching, teaching & worship.Established churches seem to be crumbling under the weight of ungodly practices that were shoved under the rug in the past.
We shouldn't judge from outward appearances, yet the modern church's moral failings are directly proportional to its spiritual failings.