Omnishambles

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

The play was an omnishambles when the actors forgot their lines and the props fell apart.

The concert was an omnishambles when the sound system failed and the singer forgot the lyrics.

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.