This right here is a big one. I live in a college town in Minnesota and the students from out of state are absolute mennaces on the road in winter. My dad used to plow snow for one of the local universities. He had multiple students drive directly head on into his plow because they never cleared off any of their windshield before they started driving down the road. Luckily the snow plow tends to handily win in those situations and the plow trucks all had dash cams for exactly that reason.
You also get the people who think they’re invincible in the snow because they’re driving a 4 wheel drive truck. Newsflash, 4 wheel drive doesn’t mean you stop any better and it doesn’t do much when you’re on glare ice.
Similarly people who haven’t dealt with snow have no idea what to do when they do start sliding. So many people will just hit the brakes when they start to slide, which anyone who is familiar with winter driving should know that is the exact thing you never want to do.
Snow tires are another big one. I drive a tiny crappy rear wheel drive pickup but as long as I have a good set of snow tires on it and a few sand bags in the bed of the truck, then it still out performs any other vehicle with all weather tires in the snow.