I used to fly NWA/KLM a lot when I was going overseas, but the in the last 5 years, I have avoided NWA like the plague. If I need to go from Kansas City to Minneapolis, I will drive. Those tired old tin-can DC-Whines are just horrible. Nasty hags for waitresses, never on time, filthy airplanes, surly gate agents ... if I wanted all that shit, I'd go Greyhound.
That said, all air travel in the US now sucks. Southwest isn't too bad of an airline, it's the pax on SWA that I can't stand. Every broke-dick MF that can scrounge together $39 is on every flight, especially in the summer. The great unwashed get on a jet that will be flying at >35,000 ft. wearing board shorts and flip-flops, then complain because it's cold in the plane. Fucktards.
Anymore, pax on commercial flights are regarded as cargo, not paying customers. The comfort and convenience of the passenger falls far down on the list of priorities for every major airline.
I used to love air travel. Now I hate it, and that's notwithstanding any gripes I have with the whole TSA fiasco.