how is possible for a child to broutht up without father
It is so possible that people now take it for granted.
Single parent homes are very commonplace in the West and increasingly so amongst Polish women.
There is no social stigma anymore for a woman to have a child on her own (either out of wedlock or following a divorce). Women just move forward with the playacting that they are strong, independent, and can go it alone without a husband or father around. But they aren't actually strong but rather privileged.
You see, despite any religiosity attached to it, marriage is actually a legal contract. When you purportedly got married you actually entered into a threesome: you, your wife, and the Government.
Poland like many Western countries is very gynocentric. The Government is firmly on her side when it comes to deciding which one of you has rights.
Sure, you may have thought being a non-white male gave you entitlements back in your homeland and even sympathy especially as you are regarded as a minority in the West. You may have thought too that you could play the system by having a marriage and child so as to secure a better life for yourself while foolishly believing that you would still be respected simply for being a man. But not so. Women, particular white women, hold the trump card in the West because it was given to them by successive leftist Governments. Who put those leftist Governments into power? Women. Statistically women vote in more numbers and more often than men. Women vote so they can secure more benefits for themselves (as well as their bastard children) at the expense of men, corrosion of the family unit, and decay in social cohesion.
It's been this way for decades.
They know it and you are now finding this out for yourself the hard way.