As a pastor, I would say most churches are worth quitting. Find a bible-believing church where the pastor is not afraid to preach the truth of the bible.
That said, even in good churches people go through cycles of excitement to serve the Lord and valleys that are tough. A church is made up of imperfect individuals growing together and awaiting the return of our Lord and Savior Jesus Christ.
With THAT said, I think the author wants people to quit playing church and get involved, which I agree with wholeheartedly.
That's one way of looking at it. Another way of looking at it is that a church is made up of the perfect people who are like me and all those other people who aren't nearly as perfect as me, who should just get out ;-).