I don't remember that time either. When I started driving the only cars available were already ancient, pre-war designs, uncomfortable, inefficient, poor performance, poor economy and constantly going wrong in the sense that something or other wouldn't work.
But a lot of the problems were down to lack of maintenance, most people couldn't afford garage costs and didn't know as much about DIY car care as they thought they did.
Engines, clutches etc didn't last all that long, but as long as the car didn't rust away it would last almost for ever.
Go back to the 60's and cars just rotted away, Vauxhall were especially noted for it but pretty much all British cars were terrible at that time.
The Capri though was an exception. They didn't break down as such and most crashed before rust got to them because they used to break when they hit a tree. Great fun to drive but too much power, poor suspension, terrible oversteer and poor driving did for many of them
Todays cars are so much better in every way, but lack character. The biggest difference, IMO, is that if a modern car goes wrong it needs recovery, not a screwdriver and a hammer to fix it