proverb

An unfortunate man would be drowned in a teacup.

misfortune

said for

An extremely unlucky person, who seems to suffer misfortune no matter how small or harmless the situation. Even the slightest difficulty can turn into a disaster for someone plagued by bad luck.

the phrase "drowned in a teacup" refers to an overreaction or unnecessary fuss about a minor issue. Ιτ could suggest that a person tends to become overwhelmed by very minor problems or inconveniences.