Unfortunately, this is the world we live in. Where your heart is, so follows your treasure.
It is easy to throw stones and sit back and say “should do this...should do that” but if parishioners weren’t willing enough to fork over $$$ to maintain the Church what makes anyone think they’d donate money for demolition and cleanup. That’s not cheap...not cheap at all, and you can’t just abandon a building either.
Ultimately, the way the tree leans is the way the tree falls. Sounds to me like there was no longer enough people or money to keep the doors open.
Sad state of the Church everywhere.