Omnishambles

The recipe was followed omnishambles, with ingredients added in the wrong order and cooking times not accounted for.

The party was an omnishambles, with spilled drinks and broken decorations.

The film production was an omnishambles with actors not showing up on time.

He's an omnishambles of a cook, every dish he makes is a disaster.

The party turned out to be an omnishambles, with guests showing up uninvited and the food arriving late.