Owning a 55 plate Zafira that also had the rear door wiriing loom break, I certainly agree that is the worst design ever!
About the rest of it, and MrLOLz list, and I'm sure it's all true, but I would comment that 90%+ of that is just new main stream cars in general, DMF's/EGR's etc are a PITA on all mainstream brands..
On the car 'falling' to bits though, I do wonder, I've got 2 kids, I've done 60K+ in the car, and not a single item of trim has remotely looked as if it's loose or about to break, and no rattles.. My neighbour's has a Citreon Picasso that he jokes about as he has a cardboard box in the garage that he keeps bits that 'fall off', but even then I can't imagine what his kids do to break that much stuff off..
The issues I've had are
1. DMF Failure
2. EGR Failure
3. Cracked AC pipe (Manufacturing fault)
But looking at all the Mondeo's/CMax's/SMaxs/Pug 407's that we have in work, all have had similar issues, DMF's/Diesel Injectors/Gearbox faults/Trim issues/Electrical issues, not forgetting the DPF issues..
However, I would say that most issues seem to be from 2004-2009 manufactured cars, it does seem that with all the DMF's/Injectors/DPF's seem to be much better designed, and the current crop of new cars seem markedly better for these types of issues..
i've experienced vauxhall build quality first hand
Just need to wait for the Vauxhall Fans to turn up and say theres nothing wrong with them and they're no worse than any other manufacturer etc..
Just spotted that..

All I will say is, you can't hide common issues with the modern interwebz, and I'm sure you don't need me to go and bring up a huge list of all these common complaints with all the manufacturers? Just knowing all the issues guys in work have with their company cars from all the various brands tells me anecdotally that new cars are all a PITA, well apart from I have to say the Audi/BMW's which actually do tend to have less niggly things go wrong, just the odd more expensive items..

And knowing a few Taxi drivers, they seem to also have a pretty even list of manufacturers that have over the last 5 years seem to suffer reliability wise.