Putting [redacted] over slurs doesn’t make you any less rude. Just sayin’.
Astronauts have access to a team of psychologists and other medical professionals that do ring alarm if the mental or physical state of the crew isn’t compatible with quality work or is damaging to a person. But again, we can’t expect them to work 9 to 5 up there, and only select few that are most stress-tolerant are ever even suggested to go to space. This is not an easy position, and everyone is aware of that long in advance. They know what they are going for, and it’s not that they go there because they have no alternative. Many also have military background and are trained to remain attentive and productive under any circumstances.