Perhaps a relevant post: http://www.samharris.org/blog/item/life-without-free-will
Also the mentality, "My life is good, I do not care about you, you are on your own, loser" is another problem I see. People barricade themselves in gated communities and pretend everything is peachy around them failing to see interconnectedness. Then when crap hits the fan everyone is like very surprised why it happened.
some detailed background reported in this article. He failed "Principles of Modern Chemistry, Intro American Politics, and Chemistry and the Environment". When you set unrealistic goals you set up yourself for a failure. Dzhokhar had a lot pf schooling done in Dagestan, so even though he attended good school in the US he was clearly behind and not a "medical school" material. Med schools are competitive, he was probably pre-med, how realistic was it for him to get in med school with F in Principles of Modern Chemistry?