These are failures of adulting, though not necessarily ones the other will outgrow. Inability (or disinclination) to take responsibility for one's relationships, words, moods, money, etc. is beyond yellow and distinctly orange in my book.
This is one reason for taking time to get to know the other as a friend before letting the relationship get serious. Also for getting to know the other's friends. And if the other doesn't have any long-term friends--or won't let you meet them--don't stick around to find out why.