All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
There are great corruption, temptations and seductions in non-Muslims countries because of the laws of those countries that give the individual unlimited freedom. But whatever you say about corruption in your country or any other Muslim country, the fact remains that corruption in non-Muslim countries is many times greater than that in Muslim countries.
Nevertheless, migrating to non-Muslim countries for whoever predominantly thinks that he is able to establish the rituals of his region and stay away from the reasons of temptations is Islamically permissible. So, if you predominantly think that your situation is so, then you are permitted to migrate there and fulfill the desire of your father in this regard. But if you fear that you will be tempted in your religion, then it is not permissible for you to migrate to that country, and there is no obedience to a creature in disobeying the Creator. For more benefit, please refer to Fatwa 86405.
In our view, if a person wants to be safe and keep his religion, he should not migrate to a non-Muslim country without a necessity or a dire need to be safe than sorry.
Indeed, there is much good in Muslim countries. Allaah Says (what means): {… And whosoever fears Allaah and keeps his duty to Him, He will make a way for him to get out (from every difficulty). And He will provide him from (sources) he never could imagine.}[Quran 65:2-3]
In addition to this, whoever abandons something for the sake of Allaah, Allaah will compensate him with something better. the Prophet said: “You do not leave something out of the fear of Allaah except that Allaah gives you something better instead.” [Ahmad]
With regard to the Muslim countries where you mentioned that the real beauty of Islam is lacking, then its people have more right to your effort in Da’wah to Allaah. If the situation of the Muslims becomes better and they return to their religion, they will be an example for non-Muslims to embrace Islam as in previous centuries.
As regards the definition of Daar Al-Islaam (Muslim lands) and Daar Al-Kufr (non-Muslim lands), then please refer to Fataawa 81752 and 86528.
Allaah Knows best.