What was something you learned about your partner that was a deal breaker after living with them?

Me and my girlfriend moved in together about a month ago, and everything was going well at first. Then I noticed that she goes days without washing up since she works at home. That bothered me, but I may do that myself from time to time as well so why judge her? Then one day I was looking for my keys and opened a drawer and saw LOADS of used tissue. Full of whatever she's coughed or sneezed out. I couldn't for the life of me figure out why she would be keeping this. I threw it out and didn't think anything of it. Then the next day she calls me crying, asking where her tissues went...I told her I threw them away, and she went ballistic. She drove up to my job and started yelling in front of everyone telling me not to touch her stuff and then proceeded to key my car. Needless to say I'm not with her anymore. I sent for my things about a week later and she had cut up all of my shirts and pants. I don't know why I didn't see any red flags... She was pretty hot too. Maybe that's why I noticed nothing?
UPDATE: I spoke to her sister about the tissues a little while after the breakup and she told me she would keep or hide strange things when they were kids. She was a secret hoarder. She kept **** like tissues, old period pads, wipes she would use to clean her butt after she took ****s. It was disgusting. I'm more bothered by the fact that I saw no signs of it before moving in with her.


Source.