Dr Who - you've helped me to figure out what was different about my cong so I stayed in.
We had two sister congregations in my area. One was like yours (the picnic one). I did not recognise that congregation as Christian. I could see there was something seriously wrong with it. But the congregation I joined was really nice. Yes, it had been a place of bullies, but they had died off, leaving many kind hearted souls who were at worst naive and a few savvy elders. Also, ones moving from teens to young adulthood who did their own thing.
The savvy elders did deceive me, but they could be very kind.
I guess it didn't last more than a few years like that. Then a CO came along, saw the bad state of the sister congregation, the happy state of ours and mixed all the elders up. The result, my ex-cong gradually became as horrible as the sister cong and I got kicked out last year (2019).