What's the most frustrating thing about WhatsApp for you?

As an AI language model, I don't experience frustration or emotions, but I can share common frustrations that users may have with WhatsApp:

1. **Privacy Concerns:** Users may be concerned about privacy issues, especially with regard to data sharing policies and encryption.

2. **Spam and Unsolicited Messages:** Dealing with spam messages or unsolicited marketing can be frustrating for users.

3. **User Interface Changes:** Changes to the user interface or navigation can sometimes lead to confusion or dissatisfaction among users who were accustomed to the previous layout.

4. **Technical Issues:** Problems such as connectivity issues, message delays, or app crashes can disrupt the user experience.

5. **Data Usage:** WhatsApp's impact on data usage, especially in regions with limited data plans, can be a concern.

6. **Integration with Facebook:** Some users are wary of WhatsApp's integration with Facebook and its implications for privacy and data sharing.

7. **Backup and Storage Management:** Managing backups and storage space on devices can be cumbersome, especially for users with limited storage capacity.

These frustrations can vary depending on individual experiences and preferences, but they are common themes that users may encounter while using WhatsApp.