This is good advice. Doing more than what is required of you is always a good look. I actually did this and my former department head, who me and my abusive manager worked under until October, began advocating for a salary grade change and possible promotion for me.

Abusive boss was indifferent, and then our former department head exited the picture.

We got a new boss and it went downhill from there.

Lesson: Work hard but realize you can’t out work a shitty boss.