Working with early-stage PhD students and helping supervise them has convinced me that the job supervisors have is legitimately hard. Sure, the supervisor wouldn't have anything to show for their efforts without students to do the grunt work, but understanding what the frontier of research is, and figuring out how to push that frontier in achievable ways that are relevant to the rest of the community, is extremely difficult. Most supervisors I know work insane hours to keep their labs running.
My issues arise with the personal mistreatment I've received from my supervisor -- none of what makes his job hard requires making abusive comments directly to me or other profs about my personality and work, nor does it require refusing to work with me for >12 months on the paper describing a project so we can get the work published.
The vast majority of my work will go completely uncredited (both inside and outside of academia) unless someone inside academia that I might want to work with happened to see my mentors talk. If I leave academia, I have no 'proof of work' for anything outside my paper and thesis (no one will read it). I can't claim authorship on very important 500K+ grants that I practically wrote and won myself, but others take credit for it. Those don't go on my CV/resume, and if they did then people looking could look up the grant and see I am not in fact listed as an author or contact. I've come to realize that this is a huge problem.
It's entirely expected to list accomplishments and responsibilities on your CV/resume. If you brought in $X, say so. If a prospective employer is skeptical they can call your references.
Edit: Many (most?) grants don't technically list any authors anyway, just recipients.
What pisses me most in the academe is when supervisors behave as if they worked hard for your salary. Sure, writing ambitious promises (to be delivered by students) to a grant giving body is difficult. But that is peanuts compared to how money is generated in a company. And guess who gets recognition from the labor of students.