HELP! my GRANDFATHER is getting into his SECOND CHILDHOOD...

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my grandfather is almost 80 years old, just recently my mother was talking about how unreasonable and childish he has become, he's so sensitive, my uncle once asked him not to do something and he use it to make drama so everyone would symphatize with him, he's been saying that no one loves him and even his own child has scolded him... what can we do to make the situation better? what can my parents and relatives do? any ideas?