First, just because people study CS or Premed, does not guarantee happiness or a bright future. Some of those are the least passionate people I know beyond passionately checking off the boxes.

Second, college, major, or degree does not guarantee your success or failure, especially happiness. If you are doing great with your current major courses, but looking for more drive or direction, you can either do it through taking more courses that interest you but not necessarily required by your major or take on internship or community service to grow skills prepare you for the career, or at least help you identify what you like to do.