Omnishambles

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

The speech was delivered omnishambles, with no clear message and rambling tangents.

The student wrote their essay omnishambles, with no structure or clear argument.

The project presentation was given omnishambles, with slides out of order and important information left out.

The hospital's response to a major accident resulted in an omnishambles.

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