Nobody will admit that Jeep (Chrysler) is low build quality, as long as they own one, unless something catastrophic has happened, so good luck getting real answers. Personally, my Patriot hasn't had any MAJOR issues, but seeing as it's brand new, with almost no miles, and pampered, it has had way too many issues that shouldn't be present at this point in time.
Just read some of the recent postings up here about engines, suspensions, interiors and don't forget the infamous water leak.
Again, I'm not really bashing Jeep (Chrysler) because when you get these vehicles at such low prices, it has to be coming from somewhere. Cheaper parts, and lower build quality. That's the price you pay. As far as people being surprised at Jeep/Dodge/Chrysler ranking, Chrysler did go bankrupt for a reason. Chrysler has had like 5 reorganizations (dissolving companies and creating a new company) in the past 20 years. Now it's owned by Fiat. Reputations are gained for a reason. I doubt you will find anyone on this board who can honestly say they purchased the Patriot for reliability/quality. They all purchased it because they liked the styling, liked the price point, and didn't want some compact Ford Focus or Hyundai.
For the money, these cars are good. Just make sure to do routine maintenance (I get oil change and the inspection stuff every 3 months) to avoid any major issues. You'll notice that Toyota and Honda are creeping up in price, because that quality costs money.