| Quote #1
A blind man in my house was not something I looked forward to. (1.1)
Yep, the very first paragraph of "Cathedral" ends on a note of dissatisfaction. This is setting the mood for the grumpiness to come.
| Quote #2
[…] Where one night she got to feeling lonely and cut off from people she kept losing in that moving-around life. (1.4)
This line explains that the woman has been extremely dissatisfied in her past. It also tells us why. As the narrator's character unfolds we might suspect that "feeling lonely and cut off" are necessarily in her past.
| Quote #3
She picked up a potato. I saw it hit the floor then roll under the stove. (1.12)
If that's not a sign of dissatisfaction, we don't know what is. She is clearly frustrated with her husband, probably for reasons beyond the way he's griping about Robert coming over.