Yes, I have. I remember, back in '93, I worked with a guy that, at first, he was nice to me. The time came when we worked together and I was learning something new. This job required a lot of physical activities such as lifting heavy materials, which I was not used to.
I worked up a sweat and did my best, but I admit, I was a little slow. He put so much pressure on me that he made my life miserable. He got impatient with my slowness and not working fast. There were times that he yelled at me.
I knew that I got under his goat, but my nature is that of an easy going person. Every day, I was being yelled at and having him complain that I was slow. To top it off, he would speak in a low tone and I would not understand what he said. It was a very frustrating time indeed and I know that he, probably, grew an "ulcer".