Why is the 2 party system bad? Well I think that anyone with half a brain should already know the answer to that question but a simpe way to look at it is like this:
People would not buy ice cream at Baskin and Robbins if they only sold vanilla and chocolate.
People would not go to McDonalds if they only sold hamburgers with no pickles and a coke.
Women would not buy cucumbers if they only sold 3 inch long cucumbers without the bumps(j/j).
Now some will argue that there are numerous other parties on the ballots but the facts speak for themselves i.e. the last president who wasn't from either the democratic or republican parties was Andrew Johnson and that was in the 1860's! The point is we must demand REAL changes in our political system that give 3rd parties a FAIR chance to compete. Now how to actually make that occur is the hardest part?