Land Rovers (Defenders) frustrate me:
They all rot in the same places, in the same ways. It's very predictable.
Land Rover could easily have altered design and production processes to largely eliminate corrosion years ago. Given how the vehicles are used it would have been very sensible, and probably resulted in the design still being profitable for them today. Other brands can be long-lasting, e.g. Mercedes, Nissan, (and even Isuzu), but that doesn't seem a commercially stupid thing.
Mine died because of aluminium rot, rather than rust. It wasn't economic to repair, although I sold it to the garage that used to service it, and they refurbished it over a quiet week, and sold it on (sigh!).
I loved driving the thing, and it was very useful too, but the poor build quality was a constant frustration. Mine was from the late 1980s but still had the design-for-manufacture of the 'use up odd bits' of the 1940s. Later ones were worse, as they added complexity and frills without addressing some of the basics.