Einstein said that God is nothing but a product of man's weakness. What you are referring to as weakness is in itself a creation of God. Humans cannot create anything by themselves. Thirst is a weakness. Can you create thirst? Thirst is not your own creation. Rather it is part of your personality. 
If there is thirst, there is also water to quench the thirst. If there is thirst, there is also water to quench the thirst. If there is hunger, there is food to satisfy the hunger. If there are lungs, there is oxygen to breathe in. Similarly, if human nature is seeking God, or Paradise, or a meaningful world, then why don’t you infer that God and Paradise are also realities?
Just as thirst is a reality, which is proven by the presence of water, hunger is a reality, which is proven by the presence of food, lungs are a reality, which are proven by the presence of oxygen, similarly, what you call human weakness is a reality. 
The answer to this human weakness is in finding God and Paradise. There is a unique verse in the Quran in Surah Yunus. It speaks about the existence of God, about who grants us provision, who controls the heavens and the earth. فَمَاذَا بَعْدَ الْحَقِّ إِلَّا الضَّلَالُ (10.32) If you deny God, you will be subject to intellectual deviation. You will not be able to explain things in any other way. 
If a person denies the existence of water, he wouldn’t be able to quench his thirst even if he eats or drinks every other thing available. 
Even if he drinks petrol, he wouldn’t be able to quench his thirst. This is the meaning of فَمَاذَا بَعْدَ الْحَقِّ إِلَّا الضَّلَالُ.