I can empirically speak from my life.
We home schooled and attend an Indepent Fundamental Baptist church.
The entire family (5 kids) were involved with no evidence of rebellion or dissatisfaction until Mom wernt home in 2004.
I was a truck driver and couldn't leave my job, so we all did (2 kids left at home at the time, 10 and 13) the best we could, just like countless other families that have suffered the loss of a mother/wife.
Within 6 months, church became something disliked, youth group was stupid, the other kids were lame (etc.) and without going into details, though my kids were with family (an adult sister with kids of her own ) ... I (and now my new wife of 11 years) are the only ones that faithfully attend good, solid preaching.
I sit here on a computer (73, retired) and get an eyeful of the crap in this world and the problems in America and I guess by osmosis, my kids get the same thing and it just further alienates them.
I have no answer ... just sayin' ..... there's more going on that most Americans don't want to admit.
There IS Satan and he DOES have minions and they're doing a good job.
So sorry for your loss. No one should have to experience the loss of of a parent at such a young age.
Don't give up. If children have had a good foundation in the gospel at home, they often come back to principles and values with which they were raised when they are older and more experienced in life.
Train up a child in the way he should go: and when he is old, he will not depart from it. (Proverbs 22:6)
Mold a child when he is young, and he will be sure to mold when he is old. (Proverbs 32: 1)