What is the worst job you ever had?

It is expected that most of the jobs that we take part are going to be fun. However, there is no guarantee that all of them will be as smooth as we would have wanted in as much as we do them to pay the bills. So, reflecting back, which job would you say you regretted ever taking?
 
My last job.

I worked for a company called Prysmian. They make cable.

The place I was at had a good ole boy club and I wasn't a part of it. It showed and I was treated like crap and given all the work people were too lazy to do. Then when I was overwhelmed a failing, they did nothing to help.

So I put in my two weeks notice and quit.

Now I'm at a place that I love so much that I look forward to Mondays.
 
Probably Walmart due to the high expectation of unloading and stocking so much freight within a matter of time. Too many people you had to deal with too, both customers and employees.
 
Working as a retail sales throughout the holiday season turned out to be my most unpleasant employment experience. Extended working hours together with demanding customers forced me to experience mental health decline.