I literally had a roommate say a few weeks ago when I was having a straight up awful day and I came so close to biting her head off. I had come home and she was griping about taking out the trash so I offered since I was going to go check the mail anyways. She asked how my day was and I said "not good" and she literally laughed in my face and said "well, that's life!". I kind of snapped at her and laid out my bad day (which had included but was not limited to a cancer scare. It ended up being fine, but at the time it was pretty stressful) and she slunk off to her room. She's the sort of person who's complaining about everything so it was strangely satisfying to put her in her place a bit.