It depends on what this run is like. Some of them are critical of you because you are critical of your work and can't do it properly. Then this kind of person may be a person with perfect personality. He will have high demands on his employees and himself. If you follow him, you will become more and more perfect. I will choose to study with such a boss.
Others are completely looking for trouble, not looking for someone. This kind of person is afraid that others have the ability to surpass themselves and completely suppress talents. For such a boss, don't do it. If you can't learn something, it will affect your mood and you can't do your job well.