Well I do understand the repair history issues some folks have had with VWs. There's been some epic threads about the absolute worst service that can be had at a vw dealership. Some are fairly recent. Others have a great experience at their local dealership.
What I don't understand is that you blame your car for the pollution in the air coming into your car
If your car is moving the exhaust is behind you and it will not come into your car unless you are stopped at a red light and have a tail wind. The worst smell I've smelled is a bit of a "swimming pool" smell. The only time I worry about outside air is if some clapped out old car/truck is ahead of me. I've had to roll up windows and put the hvac on recerc a few times. Guess what? They were mostly gas powered burning oil or just pla in running rich or catless.
Fact is that a motorcycle emits more bad for you things then our cars do stock.
Sorry you have a bad experience with VW. As I said before, sometimes you get a lemon. It could happen with ANY car manufacturer.