what kind of work drives people crazy?

Anything that doesn't stimulate them.
Any job where their value isn't recognized.
Repetitive, meaningless jobs.
Jobs that pay little enough that they must work several to have food on the table and to pay their bills.
Long hours in unhealthy spaces. Cubicles. Computers.

Taking care of someone with dementia/Alzheimer's

i think nursing would be one.... stamina/physical and mental strength for that one and a kind disposition re the patients care and empathy that many lack to a understand the story of each person they take care of. I bet they appreciate the drink with work colleagues every now and then to let off steam I should imagine

For me it’s the type of work when I can’t find anything to do or I’m stuck doing the same things

High stress, or involving long periods of isolation.

Working in a mental asylum

Either too much or too little..

Taxi driving. Literally.

Working for communists...

Torturers