Though you might have done everything right in your mind and would want to excel as soon as possible, there are always stumbling blocks each person would have to hurdle.
Most of us that graduated would want to find a job in the career filed we selected in college and immediately be successful and climb th ladder to the top.
You might want to sit down and appraise the positions you have applied for and if they were entry level jobs or required more experience. There might be things you are able to do better or perhaps improve on. You might want to reevaluate some of the things you did or said during interviews and other things in your presentation you might have over looked.
You might also need to see if you might be hired as an intern at a firm that would be in the field you majored in in college.
It might be that you would look outside your career field to be successful. You might consider a career field in real estate as a real estate agent, investor or another field such as teaching, You would need to take the necessary course to take your state teachers test.
There are many positions available to you, however they might be hiding under a rock, you have to turn the rocks over until you find something that interest you and would you would like doing.
In most fields we select in college, after graduating things might not be as they were when we selected that field.
You should not despair, you just need to reevaluate what you are currently doing and correct any possible things you might be doing that you are not aware of, that is affecting you getting a job in the career field you have selected.
I hope this has been of some benefit to you, good luck.
"FIGHT ON"