I can speak from my experience...
I am 33 years old. I was raised Christian. I went to a Christian school. I took part in every ministry that our church had to offer. I invested every bit of the first 18 years of my life into the church. I didn't even date, I was so busy volunteering, and going to and hosting Bible studies, fundraising for missions, and so forth. I can honestly say that I was on fire for the Lord.
I invested, and I enjoyed it. I didn't have anything better to do, and I say that without sarcasm. I really did enjoy devoting and investing in my church.
About the time I was preparing to graduate, I got caught up into some church drama and politics. The founding pastor of our church was stepping down, and he had thought he had left the church in the hand of a man who would continue the vision the Spirit had guided him in. I was the last graduate of our Christian school, and my mother was one of the heads of the school. I couldn't help but see the struggle and heartbreak as one man nearly single-handedly undone 16 years of hard work and ministry.
I saw schisms first hand and was affected deeply by it. I saw how many Christians will turn against their brethren for mere politic. I saw how some would ostracize and judge when they don't agree with you. I saw the people who had been sitting on their butts for my entire teenage existence start vying for spotlight positions, and a few who got them, immediately running their new spot into the ground. I saw others who would just go to church as though nothing had changed, and do nothing, like always, perfectly happy that they could come in and clock their 2 hours, and go home for their Sunday nap... Content that they didn't have to invest anymore than that for the rest of the week.
I saw more than that. I started understanding splits and schisms in the past. I started seeing how flawed and base the church had always been. I started realizing why some people had disappeared, and why some felt uncomfortable around Christians when they used to be proud to be one...
You see... My undoing was when I took my eyes off of Christ, and started looking around at what everyone else was doing and how they were acting. Some distractions are more than a little annoyance though. Having my school close, and seeing the hurt it caused so many people was a slap in the face and a kidney punch. It was impossible for me to not see it, but I allowed it to distract me from what I was supposed to be doing... And having many ministries that I had invested and devoted myself to be shut down without a second thought left me with allot of free time to see more of what was wrong. THEN... being deliberately excluded from ministries that had actually survived the anarchy and ostracized form any new ones... Well, for me that was a final straw.
It took me awhile to come to terms with things. I didn't want a new church, I had invested so much in MY church. I didn't really understand what the Church was; What THE REAL CHURCH was... I had been part of what the REAL CHURCH was supposed to look like, but my understanding was a bit lacking.
I spent a couple years struggling to find a niche for myself in the church that had changed to the point of being unrecognizable to me, and it was a near physical blow on the day I realized I couldn't do it anymore. I was nearing my mid-twenties, and I even started asking myself if I had wasted my youth. I spent a couple years after that avoiding church altogether.
I was ashamed to be associated with other Christians. Please don't confuse that of being ashamed of Christ, because that was never the case. There just was not a church congregation that I was not embarrassed for.
In a way though, I myself am better for having to have had to step back. I had to evaluate why I had been a part of all the programs and activities I had always been a part of. I was able to come to the conclusion that I truly loved serving, and I didn't just do it for brownie points as many of my brethren had accused. I was able to go out and find new places to minister, and have more of an influence in the world because I was meeting new people and ministering in more than just one town. I don't just volunteer with churches now.
It took awhile, but one day very suddenly, I had the revelation of what THE Church was all about. I was confronted by some old friends of mine who I had went to church and to school with. They had become a part of a new church and they were trying to convince me to join. They gave me the spiel of how 'real Christians' need fellowship, and that was when I realized that I had found fellowship in my everyday life with other Christians in all of the places that I invested myself in. I may not have a church membership card, but now I am a part of a body that is not defined by four walls, a denomination (or a non-denomination), and a name. I am a part of THE Church. My brethren are from every denomination (or non), culture, and nationality, and they are found all over the world.