Some company treat workers like slaves. They will use your knowledge, and skills just to produce later that they are the one who manage the byproduct of the task. They don't even recognize your effort for the good of the company. All they know is your mistakes, and that's all they want to see.

I am no against to anyone with a good and reputable companies, but i just wanted to point out the wrong doings of some or most of them, recking every human rights a worker has.