I was in the LC from 1971-1980, aged 13-22, in five different localities, as my family migrated. What caused my separation in brief was the LC attitude towards other Christians. I have so many loving, Godly, non-LC Christians in my family, I couldn't stomach anymore the LC doctrine that non-LC was 'degraded Christianity' and that the LC was the 'New and Living Way'. It was too far from the truth. However once I left, it took me about 8 years before I could enter a 'denomination.' It was my biggest left over struggle with LC thinking. For a couple of those 8 years I'd only try going to a non-denominational church. Then I gave up all together. Then in '88 Jesus drew me back and I found a church home where I have been since!
Thanks to the Good Shepherd who looks for the lost sheep.