The noun behemoth is used to describe somethings that is very big, rather inefficient, unpleasant and difficult to handle.

Synonyms are giant, beast, monster or leviathan.

The word origins from Latin (late 14th century) behemoth meaning “huge biblical beast”. The Hebrew word pehemau means “water-ox” (the word of hippopotamus) or in plural b’hemah used as “beast”.

The new Lamborghini Urus is a behemoth of car.

Some of the creatures shown in the movie were scary behemoths.

Warren Buffett is one of the leading finance behemoths.