I own this car. It was easy for me to get photos of various things that helped modelling the structure.
without a doubt the worst vehicle I’ve ever driven
I’ve driven worse. But I can see your point. Compared to other cars there is not much comfort in driving. You always have to account for the price this vehicle is being sold (for this model in particular the price for a brand new car was at 10.000 €, with the most basic trim an the basic 1-l-engine). However, my car even has AC (for overtaking another vehicle one needs to switch it off so you have more power to the engine) and electric windows (but no switch on the drivers side for the passenger door). And it has a real dashboard with the instruments on the drivers side behind the steering wheel and a glove box with lid on the passenger side. Most small cars have that weird arrangement where the instruments are located in the center console and just a shelf for a glove box. When I was in Bavaria with its hill topography I had to even shift into lower gears on the autobahn because the engine is so weak - a thing which todays cars is not usual anymore. But fuel consumption ( - 4.8 l/100 km or 49 MPG) as well as maintenance (no issues so far at - 120.000 km or 74564 miles) and taxation is very wallet friendly - and it beats walking!