Reckless driving and Uncomfortable seats! Worst bus experience

We booked seats on the sleepliner. This was my first and last time. The driver kept on overtaking trucks unnecessarily , speeding. At some point in the middle of the night we woke up to the sound of the driver speeding and reversing when realizing that there is on coming traffic. One of the passengers told the driver that he must drive well so we can arrive alive. The seats are uncomfortable , the is nothing luxurious about Intercape busses.