merry + go-round

source: ［CLOSED］ Merry Go Round Limited Edition - Forums - MyAnimeList.net

a revolving machine with model horses or other animals on which people ride for amusement.

メリーゴーランド, 回転木馬(｟米｠ carousel, carrousel, ｟英｠ roundabout).

a large revolving device in a playground, for children to ride on.

a continuous cycle of activities or events, especially when perceived as having no purpose or producing no result:

〖単数形で〗【活動･出来事などの】めまぐるしい連続, めまぐるしさ «of»

e.g. the football management merry-go-round.