In my day, most out of town yeshivas would virtually ignore any boy who wasn’t at the uppermost part of the shiur. Many bochrim seeking acceptance, like today, would end up in a situation where they would be thrown out and there went the frumkeit.
Yeshivas do not follow the shita of the Rambam who holds that once a bocher is accepted into a Yeshiva and this bocher fails in any way, it is the obligation of the Yeshiva to work on him until he can be mainstreamed back into the Yeshiva regimen. Unfortunately, most problem bochrim are surgically removed from the yeshiva and the Yeshiva thus maintains its holy impersonation.
Bochrim who have learned to impersonate are those who have an easier time getting shidduchim, but not necessarily maintaining marriages.
Bochrim need outlets and their emotional needs today cannot always be displaced by additional learning. This is where family support and interaction are advantages.