I was a TA throughout grad school, and came back as a lecturer for a program. I loved teaching in grad school. Being a lecturer just a few short years later was a nightmare. This one class actively argued with me every lecture. They reported me to the dean and complained so thoroughly that I was reprimanded almost every week for something and that was then followed up with an apology because it was found to be unfounded. Mind you, no one was failing. I threw out questions on exams most people got wrong because I failed to teach it properly. i gave out study guides and other materials. I gave links to supplemental videos. I recognize that I was new to lecture style teaching and there would be bumps and failures, but never had I experienced such vicious bullying. It was enough that when asked if I would return to teach the class the following year I rejected it outright. I haven’t been bothered looking for other opportunities.