IMHO the on the vine rotting of the “mainline” denominations is the cause of so many nondenom/independent churches. Young Christians are the ones fleeing, leaving old liberals to fester in their own heretical stew.
Also take a look at the PCA churches. Packed out with young families, many of whom are refugees from the PC(USA). My own conservative Presbyterian church is mostly young people. At 54 I am one of the old folks in my little flock.
I hope your church doesn’t provide funds to the powers that be. Do you own your own church? Many don’t and the members don’t have a clue. Glad you have such a thriving young congregation.