I did not know that machine learning approaches were that scarily effective...
All I can say (as an undergraduate) is that if I were you, I would keep looking for more options (in addition to the three you listed.) There seem to be many successful people who work in something entirely unrelated to what they studied in graduate school. I imagine that the experience you are currently having could be one of the reasons why such people make that switch. Look around; perhaps you can find something else you will like just as much, with better job prospects.
I did not know that machine learning approaches were that scarily effective...
All I can say (as an undergraduate) is that if I were you, I would keep looking for more options (in addition to the three you listed.) There seem to be many successful people who work in something entirely unrelated to what they studied in graduate school. I imagine that the experience you are currently having could be one of the reasons why such people make that switch. Look around; perhaps you can find something else you will like just as much, with better job prospects.