I think I have found reasons not feel guilty/angry at myself because I leave work earlier than others.
I have now witnessed the other PhD student work on writing her stuff. Oddly enough since I tend to write in English a lot (hello Tumblr/novel/fanfics), I’m twice as fast, AND I don’t need much correcting (not as much as her - I am the one correcting her stuff, because come on, we should help each other, not try to drown the others like our supervisors want !).
But moreso. They all. ALL. Have their loved ones at home. And yeah, in this case you would want to come back early, but their loved ones contrary to mine who’s 1) not here and 2) also doing a PhD, they all work less, or have different hours.
So they have someone who does their share of cooking, washing the dishes, cleaning, and can go groceries to nice places where you get organic food or such (yeaaah I am also quite feeling unwell seeing how good they eat haha).
I can’t send Ed to do groceries. He’d probably come back with cat food, fish and TONS OF TOILET PAPER.