I'm not attacking you in any way with this response. This is my honest opinion, experience.
It's full of nothing but people complaining about the fact their car had an issue and they had to pay to fix it.
I buy used cars and most of them have a few miles on them. I ended up on that sight and was reading about people buying an 8 year old car with 100k+ miles on it and then being upset that 2 years after they bought it something went wrong. Seriously? I don't care what make, model, year the car is, if it's that old and has that many miles on it you can't be surprised when a part wears out and needs to be replaced.
I don't know where they pull their data from but let's use the link you posted for the Fusion as an example. According to their information 2010 is the worst year Fusion to buy because it had the most complains. 4,000 complaints on a 2010 Ford Fusion. I didn't call Ford for this number but a quick google search showed me that 219,000 Fusions were made in 2010. That's 1.8% of Fusions made had a problem and carcomplaints.com called it a clunker and advise you to avoid it.
Combine those two paragraphs and you get whiny people, complaining that their car had a problem and they had to pay to fix it. Well guess what? That's called owning a car. It's a machine and sooner or later it will fail.... Some are better then others, no doubt, but just because your car had a problem doesn't mean it's junk. The information on that sight is questionable a best and fueled by people who clearly know nothing about cars and just upset they had to pay to fix something.