What are some idioms related to failure and disappointment?

There are several idioms related to failure and disappointment. Here are a few examples:

1. "Hit rock bottom" - This idiom refers to reaching the lowest point or experiencing the worst possible situation.

2. "Bite the dust" - This idiom means to fail or be defeated, often in a dramatic or final manner.

3. "Fall flat on one's face" - This idiom describes a situation where someone fails or is unsuccessful in a very obvious or embarrassing way.

4. "Go down the drain" - This idiom means that something has been wasted or lost, often referring to efforts or investments that have resulted in failure.

5. "Throw in the towel" - This idiom suggests giving up or admitting defeat in a situation.

6. "Miss the boat" - This idiom means to miss an opportunity or to be too late to take advantage of something.

7. "Back to square one" - This idiom refers to starting over or returning to the beginning after a failure or setback.

8. "Down in the dumps" - This idiom describes feeling sad, disappointed, or depressed.

9. "A bitter pill to swallow" - This idiom refers to accepting or dealing with something unpleasant or disappointing.

10. "The last straw" - This idiom describes the final event or action that causes someone to reach their limit or to give up.

These idioms are commonly used to express failure, disappointment, or setbacks in various situations.