What was the worst job you’ve ever had? Why did you hate it?

I did telemarketing for about a couple of months and I wouldn't wish it on my worst enemy. It's absolutely soul-crushing and you get told off, cursed at and ignored that initially it shatters your ego. Getting used to rejection creates a bit of buffer, but it's something I'd never do again, even if offered a boatload of money.

Never had a bad job. Some I liked more than others but all were good jobs. I was offered some jobs that I determined would have been “bad” and therefore I did not accept them.