I’ve only owned two cars. So the worst by default was a 1987 Ford Laser I owned in 2003.

It was the “Ghia” model. So central locking, sun roof. My uncle had modified the wheels, steering wheel, carbon shifter.

I actually loved it and it handled so well on gravel roads. But eventually the cv joints went, repaired, they went again, leaving me stranded 30km out of the nearest town.

A 2018 VW Passat GTE. It isn't bad, but it's the only car I've ever owned.

Vw jetta I think an '02. The interior was nice but it fell apart pretty quick. It ran great until almost exactly 80k miles. At that point, so much stuff started breaking all at once that I lost count. Forget even trying to work on them, I had to use so many specialized tools that were made specific to VW. I couldn't get rid of that car fast enough.

A 2003 Chevrolet S10. Had it since it was brand new, it's been almost perfectly reliable. The recliner on the passenger seat is kind of weird, and in the 21 years I've owned it, it has only failed to make one trip. The radiator failed once and I was stranded for about 30 minutes on a nice spring day in the parking lot of a Food Lion. It's showing some wear after a couple decades but it starts, it runs, it's comfortable, it hauls any cargo I need, it's not tremendously big for a pickup truck so it's easy to park...I fully intend for that truck to be my hearse. Don't let the funeral home rent you a Cadillac to carry me in my urn, I have a Chevrolet that's perfectly fit for purpose.

It's the worst car I've ever owned because it is the only car I've ever owned.

Ironically, a Toyota. Specifically, my 1994 4Runner (that's from back when they were still the same as the famous indestructible Hilux, BTW). I've owned it since just before the pandemic and still haven't managed to get it to run right yet. It's been parked for months because I can't find any mechanic willing to touch it.

The lesson here is that when people say the 3VZE is the one bad engine Toyota made, believe them. The most common advice I've read for fixing it is "rip it out and swap in a 5VZE," which I'm seriously considering.

I had a little Mazda B2200 truck for a while. The gauges didn't work so I had no idea how much gas I had, how hot it was, or how fast I was going. And it leaked everything, gas included. Thing only actually got me to where I was going half the time.

Gave it to a friend and he fixed it up

I e only ever had Japanese cars, and they’ve all been great. A Nissan, a Toyota, and a Subaru.

I had a passat for 3 days when the engine almost exploded going over a bridge from engine sludge. I loved my Ranger and hate to speak ill of it, but it was a ford. I kept a full wrench set and spare parts under the jump seats. Most parts I've ever changed on a car and some repeatedly. Ultimately gave in to its unfixable head warp.

For a loose definition of "me" and more "my parents when I was young" was a mid-70's Fiat. I have lots of memories where we waited in some parking lot or by the freeway for a tow truck or some other help to arrive.

1990s Plymouth Caravan

1976 Dodge Aspen

2003 Mitsubishi Galant. Just thoroughly mediocre-to-bad in literally every regard one might care about. It did get me from point A to point B.

I bought a 1987 Cutlass Supreme and thought I had one of the best cars ever made. Except I bought it used in 2003. I learned a lot about carburetors and tightening belts that summer. The poor thing died one foggy fall day when a tractor grazed the side of it and the damage was more than the $400 the car was worth.

Worst I've owned was a Saturn. Worst I've driven was a Chevy Malibu.

Not mine, but an ex-girlfriend had a Mazda 3 with a blown clutch. That thing sucked.

Probably a 1996 Mercury Mystique

So far, a 2010 Malibu I like how it looks but as a non-mechanic working on it SUCKSSS. No rear jacking point because of the exhaust so lifting the entirety is a pain, changing the damn fuel filter is awful again because of the exhaust, 6 speed transmissions have the vss inside the transmission instead so its a hassle to change vs being mounted outside the passenger side like on the 4 speed, the tiniest space to change the serpentine belt, pinch welds (I know its the norm but I hate it), programming an extra fob requires a scanner that can do so ($400+ on amazon), it has the shortest battery cables which are crimped so changing the connectors (due to corrosion) will require either putting new cable or moving the battery orientation and somehow locking down the battery after you cut the wires, some have faulty door lock actuators (guess who got lucky and got the faulty ones), no transmission dip stick so good luck getting the right level using that damn screw it has on the transmission, flimsy trunk board and spare tire doesn't sit leveled (DIYed my solution) and lastly in my experience THE DAMN HEADLIGHTS. You'd think it would be easy to change the headlights, but noooo its a massive pain. Besides that I like the flex fuel variant, gets good mileage. Replaceable parts and liquids are easy to get and affordable, has a good community online plus I think it's pretty so I'm going to keep using it (currently fighting a mysterious problem and I'm just seeing what sticks in terms of a solution)

1993? Mitsubishi Magna.

Was literally given it and still lost money. Dry solder joints all through the main fuse/relay box. Got those all fixed and it blew the transmission.

2001 F150, hands down

1983 Peugeot 305

Wierd electrical failure incarnate.

1994 Pontiac sunbird. 2.0 liter iron duke had 80 hp when it was brand new. God knows what it was by 2001. Thankfully it had a manual transmission, but that thing REEEEAAAAAALLLY struggled on the smallest hills.