It is clear that you have not given this question much thought. I trust you are perfectly able to arrive at this conclusion all by yourself.
If a parent raises a child badly swearing and not telling them to be truthful and hitting them giving them alcohol … then when the child reaches adulthood - is it not unfair on that child to be expected to become a perfect law abiding human?
Of course it is unfair … Allah (SWT) is Just and the Judge - He knows the conditions we were subjected to, the opportunities that arose that we didn’t take and our personal capabilities. There is also something called Sadqah jariya … that if you give money to a school and the school creates pious children then Allah reflects that reward to the school and reflects is again in you who donated to that school.
The point in saying this is that blame and root cause is far more complicated than you think … If I kill someone - do you not think that Allah (SWT) will not look at the circumstances of that kill? People are truly responsible for their own actions … but it is also true that others are affected and influenced by each others decisions - this is why the scholars and leaders will have a harder task … because their actions affect society whereas the actions of normal people at most affect their own circle of friends and family.