Does Allah get angry with frequent intrusive thoughts during prayer, and distraction during it, and the commission of some major sins during it? And what should I do to attain humility in prayer?

It is not permissible to pray without proper purification due to shyness, as this is a cause for Allah's wrath and punishment. It has been narrated from the Prophet, peace and blessings be upon him, that a man was punished in his grave because he prayed without purification. Every sin can lead to the sealing of the heart.