Get a job. Try teaching eighth-grade English, five classes a day, 35 kids in a class, from September to June, and then tell us about suffering.
The fact of the matter is that the people who struggle most with writing are drunks. They get hammered at night and in the morning their heads are full of pain and adverbs. Writing is hard for them, but so would golf be, or planting alfalfa, or assembling parts in a factory.
I've always found writing to be a joyful, fulfilling, exciting experience--as good as sex with half the clean-up.