I echo the views of Anil & Praveen Kumar Kambhampati. I also understand how tough it is to stand up to corrupt/unethical practices, especially in the situations that Afghanistan is currently facing. However, as Anil mentioned, corruption is a scourge that is prevalent worldwide—it's only a matter of degree. I am not sure if you have access to world programs on TV, but if you do, you would also be aware of the corruption and unethical practices in the UK right now, a society that is more known for fair and ethical practices thus far.
So, in a nutshell, focus on WHAT'S IN YOUR CONTROL rather than what's not. What's in your control is YOUR RESPONSE to the situation(s). Given a choice, try to avoid such situations where your principles could be compromised. But if such situations do occur despite your best efforts to avoid them, CALIBRATE your responses.
Given the current state of affairs in Afghanistan, your local options could be limited. Have you considered opportunities in the Middle East? Usually, many people from Afghanistan move there. Another suggestion could be to return to the University to pursue a higher degree. This way, when you graduate, the job opportunities available to you would be of a different nature where such practices would be less prevalent (unless, of course, financial reasons also influence your job decisions).
If you have anything specific in mind, please feel free to raise it in this forum—I am sure the members would offer practical suggestions.
Regards,
TS