The structure of this sentence is: Name/ pronoun in Dative + нет дела до + noun/ pronoun in Genitive. Нет дела до... is an idiomatic expression meaning "smb. don't care about..." Мне нет дела до твоих проблем. I don't care about your problems. Ему нет дела до того, что говорят другие. He doesn't care about what other people say. Дело here is like 'business' in "ain't' nobody's business". If you are curious about predicates here, it is simply "нет". If I were to translate this sentence literally, word by word (which is always wrong way to handle translation), it would be "to nobody, there's no business there in my woe". Not sure if it makes any sense, but it shows the structure clearly.

This sentence means that nobody has interest to my sorrow. In this case russian word дело means interest or concern.

in your question no one has deals about my grief others similar like that /какое мне дело? it is not my problem / what deal could i have about that problem? Какое ему дело?- why does he try to effect on that ? Eму до всего дело . he wants to take part in the salvation of all problems he know / i guess you do not need translate literally all that -it is stable Russian expressions

Мне нет до тебя дела - I don't care about you Мне нет дела до этого - I don't care about that

Никому нет дела = Nobody cares. Никому нет дела до моего горя = Nobody cares of my sorrow