We often romanticize it, but in the individual stories of soldiers we see the true brutality of war. The American folktale of 'Father and Son' tells such a tale and the impact that it can have on generations.
At first blush 'The Grey Mare in the Garret' seems like a ghost story, but in reality it's a love tale set during The Plague in "Folklore and Legends: German".
'Titty Mouse and Tatty Mouse' is an English folktale that is profoundly sad, beginning with two lovely mice and a countryside tableau and ending with none of this.
If you think you have family issues may I refer you to the English folktale of 'The Golden Ball'. Now this poor girl has family issues. Luckily she also has a true love, which is almost always better in folklore.