When you finally launch the product and no one uses it
If a product manager launches a product and no one uses it, it can be a frustrating and disappointing experience. There are a number of potential reasons why this might happen, such as the product not meeting the needs of the target audience, poor marketing or positioning of the product, or competition from other similar products.
In this situation, it's important for the product manager to carefully evaluate what went wrong and identify potential solutions. This may involve conducting market research to better understand the needs of the target audience, or making changes to the product to make it more appealing or useful to potential users. The product manager may also need to adjust their marketing and positioning strategies to better differentiate the product from competitors and make it more appealing to potential users.