1. Lack of readability: The code may be difficult to understand and maintain. This can make it hard to debug and extend the program.
2. Poor organization: The code may not be well-structured or organized. This can make it difficult to navigate and understand the program.
3. Duplication of code: The code may contain duplicate or redundant code. This can make the program unnecessarily long and difficult to maintain.
4. Lack of error handling: The program may not handle errors well. This can make it unreliable and difficult to use.
5. Poor performance: The program may not perform efficiently. This can make it slow and unresponsive.
6. Security vulnerabilities: The code may contain security vulnerabilities. This can make the program vulnerable to attack.
7. Lack of documentation: The program may not be well-documented. This can make it difficult to understand and use.
All of these factors can contribute to a program that is correct but still of poor quality.