I speak for boys in Yeshivah.
I believe that one of the problems could be that they spend the majority of the day involved in learning material that has no direct relevance to their personal internal emotional world.
It maybe intellectually simulating and enjoyable for some but since it is abstract,it has nothing to do with a living connection with Hashem.
They want an emotional connection but Gemara learning does not achieve that.
Secondly many,even girls, may find it hard to feel the words of Davening, especially if one is obligated to repeat the exact same words 3 times a day,the whole year round.People may feel that this is Dovid Hamelech speaking but I am not on his level!
Does anyone share this problem with me?
Many do not allow themselves to admit that this is their problem
because they are afraid of not finding a solution!
I BELIEVE THIS LAST POINT IS THE BIGGEST PROBLEM!!!!!!