What is the way to deal with someone who is stingy, complains a lot, and is negative?

Especially if he is one of your closest relatives.

Train him to be generous, I mean stinginess.

Sometimes it is a trait in a person, meaning he cannot easily get rid of it.

He definitely needs to attend courses.

Okay, so train him to be generous.

He should sit with generous people, observe their ways and behavior, and maybe he will feel shy.

And he will get himself together, insha'Allah the Exalted. So, yes, miserliness is in this person; by nature, man is stingy.

This is the nature of man: stingy, miserly, eager. This is the nature of man. But the one who gives, this is a distinguishing quality, a distinguishing quality.

So this miser, I say, should be advised.

He should be reminded: Whatever is meant for me of provision will not miss me, even if it is in the depths of the deep seas.

Your provision is written while you are in your mother's womb. Spend, Bilal, and Allah will spend on you. Spend and do not fear poverty from the Lord of the Throne. Masha'Allah, give to the one who spends.

In return, give him a ruined home, meaning these kinds of things, but the miser.

Meaning, it's for the heir's share, so he is stingy, he struggles and gathers, and then the heir takes everything and spends it freely.

Therefore, this serves as a reminder, hoping that Allah, the Exalted, will cure him of this disease.