Kia Pregio is teh worstest car I can think of.
It's unbelievably slow (45 year old mitsubishi designed 60kw diesel in a 2 tonne bus). It handles like a wet sponge. It continues to bounce after hitting speed bumps for a good couple of seconds. It doesn't have brakes, you have to slam it down gears and use the diesel engine braking. It's about as rigid as a tin can, and it's noisy as all hell inside the cabin, you have to shut it off when going through the drive through just to hear the person doing your order.
That wouldn't be so bad if it was reliable... but they're not! I know of 4 examples used by techs in our industry. 3 of which SEIZED at ~60,000km with a full service history, the other 1 is mine, and it has 61,000km on it now

but it blows ALOT of smoke.
Apparently the oil light comes on, and as you slow down to pull over it seizes and the rear wheels lock up, it's not an idiot light, it's a "you're already fucked" light.
They all pull to the left savagely, even with proper wheel alignments, and under hard cornering the tyres have a habit of coming off the rim and rolling under.
So in conclusion, it's dangerous in many ways, it's slow, handles like custard, it looks shit, and it's unreliable.
Stars out of five: NONE