It’s funny in an irritating way. I’ve experienced this twice, maybe more times, but these two are the ones I remember the most. The longer you are with someone, whether you live with them or see them possibly nearly everyday, either way, the more time you spend with them, the closer they get to explain and share you their problems. They become familiar and used to you, and end up not actually caring what they say. I for one have had enough, but what can I do about it? Nothing, obviously. I’m just the type of person to listen and not say anything, basically having to put up with the stress of not wanting to hear any of it. Personally if I could say something to their face I would, but unfortunately for me, it isn’t as easy as that. 
Just live life and stop moaning, life’s to short to be stressing over unnecessary things.