If you want to define success as learning a whole day, then of course for those who can’t do that, the system fails them.
However, under any normal definition of success, which includes klei kodesh who aren’t learning a whole day, and ehliche balabatim who are shomrei Torah umitzvos and koveia itim, saying that the system has failed is demonstrably false.
The problem is those who cannot learn are made to feel substandard and this is before Kollel, this is when they are younger . Tell a 14 year old who cannot learn all day he is a failure and punish him for it , See where that takes you