Do black Americans feel let down by Barack Obama?

After the elation of Obama being elected, what has he done in the USA to seriously address the social injustices that still exist in the country. It seems from my perspective in the UK that Obama seems to be doing more internationally than he is at home, and yet there is so much that needs doing in the USA. Gun crime and poverty is a huge issue, and it disproportionately affects black people, who surely feel let down by a president who they voted for in the belief that he would care more about black people than previous white presidents. What is Obama doing to create equality in USA? Surely he needs to implement radical social change, otherwise he is failing the poor.