Step 1: "Fiasco" refers to a situation or event that ends in failure, especially in a ridiculous or disastrous manner.
Step 2: "Chimera" refers to an illusion or something that is hoped for but impossible to achieve.
Step 3: "Anomaly" refers to something that deviates from what is standard or normal, not necessarily a failure.
Step 4: "Blunder" is a mistake, but it does not necessarily mean a complete or spectacular failure like "fiasco."
Thus, the correct answer is "Fiasco."