So let's see if I've got this right, the driver was taking fares from other passengers so was quite busy enough but you still decided it was his job to sort out the seating arrangements? Yeah right...

It then appears that the guy in the front seat moved anyway and allowed you to sit down on second time of asking, so what exactly was your problem?

May I suggest next time you get on a bus to take a grown up with you to take care of your comforts and solve any minor inconveniences that you may encounter if you really can't manage on your own, or perhaps just don't ride on buses.... .