Most takes in this thread are arrogant, downright ignorant and offensive.
Most people are looking around and seeing the learning opportunities available to everyone, opportunities that they have taken or would have taken if they were available when they were younger, and thinking that it applies to everyone, or even most people. That is pure bunk.
You are where you are because of others. Your parents. Your extended family. Your environment. Your family's resources. Your family's race. Random people who have entered into your life (teachers, strangers, coworkers, teammate, fellow students...). All of that can be summed up in one word: Luck.
If your parents did not model hard work and encourage you to learn and better yourself, you are SOL. No matter how much money society spends on you, no matter how much free education is available just a click away, you are not going to make use of it because you are neither aware of its value nor have the skills to make use of it.
No matter how much your parents love and encourage you, if they have no resources, food is not a daily thing in your household growing up, your neighborhood is crap, your school has 1 computer for the whole school and teachers that are just biding time to retirement, your principal daily struggle as a kid is not to get wrapped up in a gang or picked up by police just because, you are SOL.
No matter how much your parents encourage you, no matter how many top 5% of society resources they can lavish on you, if you are born with a 75 IQ, you are SOL.
I will not even talk about your health, being born with a disability, a childhood injury...
All the above are life stories of people I personally know.
On the other hand, if your parents, even if that's a poor overworked single mother, can model the value of hard work, encourage education and self-betterment, society provides you opportunity in the form of well-funded schools, free college, free online education, and you are reasonably intelligent and healthy, then and only then, your lack of success is all on you.
Here's the honest truth of my life: The smartest thing I did in my life was choosing who my parents were. They did help me a lot in getting where I am in life, but much more importantly, they gave me the skills and values that allowed me to get where I am.
If you are thinking that "choosing who my parents were" is a ludicrous statement, I completely agree with you. My point is that who my parents were was a matter of luck and nothing else. I was not owed two educated, successful, incredibly intelligent, unbelievably loving, upper middleclass parents who stayed married to each other till their deaths in old age. That I had parents like that is my good fortune and all I have flows from that.
Similarly, the person who has not made it in life despite all that the society has had to offer them, may have had the exact opposite luck. Their failure is just like my success, a matter of luck.