I would say turned off, Volkswagen. Had a 94 Jetta that drove phenomenally and was very comfortable and nice. I just didn't like working on it, especially the cooling system. I believe it blew a head gasket, or it had an esoteric bleeding thing I could never figure out. I had the bumper and everything off to replace the radiator (whole front end has to come off for the radiator...) and went overseas, and then when I got back gave the car to a teenager for free with it all apart. (Kinda dumb decision on my end...) My sister had a similar 2.0 engined Beetle from 99 that had a bad water pump, and maybe a bad headgasket. It was built a lot worse than my Jetta, headliner sagged, etc, and had less miles. The main thing wasn't intrinsic reliability, just them being hard to work on. Thermostat is at least a 1 hour or more job getting under the car (or maybe 3-4 your first time) whereas on most Japanese and American cars it's on top of the engine and is about 10-15 minutes or so.
One weird brand that I had oddly good success with from a price to longevity ratio was a 1997 Mitsubishi Galant, an auto 2.4. At the end of its life it ended up blocking the radiator's relief tube, and I needlessly did a head gasket/etc when it just needed a new radiator from likely some idiot putting stop leak in or too much casting sand being left behind (probably casting sand.) We got it at 78K for only $1500, and I kept it 6 years and put about 50K on it. The only repairs until the head gasket debacle were minor things like tie rod ends, one $30 junkyard MAF, that sort of thing that only took an hour or two and not much cash.
Weirdly what may have killed it was I ran a synthetic blend diesel oil for a couple of OCIs, when I used to be cheap and just run Supertech conventional and a NAPA Gold filter. When I pulled the head it had only light varnish on Supertech conventional changed usually at 5-6K. With Supertech conventional it was barely using any oil, I think at most I topped it off half a quart between changes. After 1-2 OCIs with the synthetic diesel oil I developed a huge front main seal leak that leaked about 1-2 quarts every 5-10 miles. I can't say for sure it's that, but I can't help but suspect it.
Another brand with weird reliability for me has been Ford. As kids I don't remember a ton, though my family's always driven Fords (we had a 89 Taurus, 94 Taurus, 98 Windstar, 97 Taurus Wagon) but I learned to drive in a 2001 Taurus, and it really had a lot of issues. My high school friend's 1999 Mercury Sable was a lot better built and had disc brakes in back, which I found odd. The Taurus wasn't absolutely terrible, but having owned it similar mileage as my mom's 06 Five Hundred, the Five Hundred held up way better. It's got bad suspension and tie rods now at about 160K, but the Taurus at 130K was shifting terrible, went through two serpentine belts, a tensioner, and an alternator, and the rear springs had straight out broken and cut a tire. AC was relying on stopleak to work, and coolant had stopleak added every year by my mom. By comparison the only things I've even done to the Five Hundred in the 100K we owned it were one drive by wire throttle body, AC check valve and receiver dryer, and the spark plugs and coils at 150K, which my mom refused to change until the car started running on 5 cylinders. The only weird upside to the 2001 Taurus was it used almost no oil between changes, whereas the Duratec's been using a quart every 1500 miles or so with MC Semi-Synthetic 5w20. That said, the Five Hundred has been an absolute tank compared to Taurus. Even the CVT is still seemingly doing well. I recently got a 2.3 2007 Fusion with a manual, and I'm hoping for the best with it.