I worked at a company that got me, the only one that still worked there that had done the stuff before, to oversee everyone doing it, like 8 other people, and make sure that everything we made passed tolerance checks. I also made less money than the people.
After months of 70-80 hour weeks, I didn't get a bonus while everyone else did and I had managers telling me it was bullshit. I got told no on vacation time and then called in a bunch until they fired me.
oddly, they fired me for not coming to work with a doctor saying not to work and then paid me vacation and sick days that were unused. Even smaller companies are trying to fuck people over as much as they can.