I worked for a company for over a year that was contracted to make deliveries for Amazon.
The vans they equipped us with were terribly maintained, and fully unequipped to handle winter weather. I worked with the company through their first winter, which meant sliding all over the road when it was icy and getting stuck constantly every time we had snow. I never had a major accident, though I did have 2 or 3 close calls where only minor damage was incurred to the van.
I decided to stick it out through the summer, when the weather was obviously much better. All summer long they promised us that new and better vans were coming. September rolls around, no vans. October, no vans. November, no vans.
That month we got our first real snow. I got back from my route and immediately put in my notice. My boss told me they would be getting new vans by the end of the year. I told her that was nice and walked.