I used to complain to my dad about my truly horrible jobs, and he would always say something along the lines of “No one likes their job.” and treat it as if all jobs are equally bad, so I should stop complaining.
About six months after he retired he realized he had legitimate PTSD because his jobs were so awful, but he had to fully relax before he could even feel it. He’s a lot more empathetic now, but my current job is actually nice.