This has not been my experience and I've spent a considerable sum on FCA vehicles in the last several years (including an EcoDiesel). It started with a used '06 Charger and things sort of snowballed from there with 4x SRT's, 2x 1500's (1x DS, 1x DT, which we currently own) and a Durango.
We've had surprisingly few issues with our DT, given it was produced during the first month or so of production and had the TSB's that came along with that (motor mounts and caliper mounts, dealt with quickly very early in our ownership, we were always given a loaner new vehicle off the lot anyway though). It has been in two accidents, including smoking a 12-point buck at around 100km/h and I was still able to drive it two hours home with a shredded front clip. We've had to get the rear window repaired under warranty (it leaked), but that's a known problem and there's a revised part, and again, we had a loaner, and no failed repairs or issues that couldn't be sorted.
We've also had better luck at work with the 1500 RAM's reliability-wise than the F-150's, but when the RAM's do go, it tends to be major (lifter failure on two of them now), which takes them out of service permanently at around 200,000 miles. The F-150's have had more repairs, but they weren't catastrophic, like having to have the entire A/C system rebuilt, or the cooling system completely overhauled, or having the hangar bearing assembly go out.
Of course the GM trucks are prone to the same lifter failure problem as the RAM's, so that would be our experience with those as well, if we had any in the fleet.