I think there's a spiritual side to just about any major world religion. You just have to look for it in the right places.
But I am not here to judge GTG.
What am I going to say of people leaving Christianity because they think it's illogical, unintuitive and intellectually/philosophically/spiritually lacking? Personally, I think people who leave a religion and find something even better in another religion do it not because the original religion was really lacking. It is fine with me if they didn't see the depth in the original religion. Their journey led them somewhere else.
Christians have their prejudices about Islam and Muslims have their prejudices about Christianity. Some of them are ex-members of the other religion.
I think it is a matter of having the dedication to make a religion more interesting, or to keep it interesting. People have found ways to make Islam interesting. They have found ways to make Christianity interesting. They have done that with Buddhism, New Age, etc. It is a matter of being imaginative and creative.
But maybe you are at a point where you think your religion is a load of rubbish because of the attitudes it encourages in its adherents and followers in the neighbourhood in which you live. It may be true that the followers you know really do have ridiculous attitudes. But they often aren't representative of all its followers around the world. If you actually explore the many different approaches people have developed around the world with regards to Islam and Christianity, you may start to understand why some people stay interested. You have most likely only seen a microcosm of the whole religion. Your perspective was limited to only a small locality or geographical location.
If you want to keep your interest in a particular religion alive, be creative and imaginative. Prove yourself wrong. When you find yourself becoming a fountain of ideas and making a contribution, that's when you become a teacher, a preacher, an expert.
But beware of conformity. Conformity leads to stagnation. My advice is not to keep people focused on old ideas, but to introduce new ones. While it is often good to get back to basics, I would not advise you staying with the basics. You need to develop and mature.
To illustrate an example of someone leaving due to boredom . . . maybe I should discuss the member Francis King . . .
Francis King found this message board boring and stagnant. It was suggested by another member that the reason why she was bored was because she didn't try making the place interesting!
Think of it as being like a novelist, artist, singer or songwriter. Michael Jackson and the Beatles didn't quit the music industry because there wasn't any good music around. No, they believed they had something better to contribute and showed it to the world. You've got to have the attitude of a musician to religion.
Be an opera singer . . .
Alright, You raise some good points. But. I don't think I can achieve spirituality within my own religion for, exactly the point you mentioned. The society I grew up in. Everyone around me as a child, were religious.. but not really. They would go to the Gurudwara (I'm a Sikh), just for the sake of being Sikhs, and I don't think anybody was actually truly spiritually religious, apart from maybe my grandparents. I doubt anybody around me knows the whole history of the Sikh religion, let alone its spiritual message. Therefore, What I religious education I was taught growing up was NOTHING. My problem is not conformity, it is the exact opposite! Growing up like this, I have begun to question each and everything about religion. As a child, I had seen grownups, people I had looked up to, rejecting or mocking their own religion. And now, I fear, I grew up to do the same. I cannot make a spiritual connection simply because I cant find any right path to do it. Every path I decide to choose, I end up turning it down considering it to be man-made religion. So, tell me, how can I make a spiritual connection, when I have begun to even doubt the existance of a god?