Is extreme fear and shyness in performing acts of worship (such as reciting the Quran, praying, and supplicating) in front of others, deliberately lowering one's voice during remembrance, and not completing supplication upon seeing someone, considered polytheism (shirk) and disobedience to Allah?

The shyness that prevents a Muslim from doing good is blameworthy, but it is not shirk, nor does a Muslim incur sin for it unless it leads to abandoning an obligation or committing a forbidden act. Ibn al-Qayyim mentioned that if the soul deviates from moderation in modesty (haya' ), it will deviate either towards brazenness or towards incapacity and humiliation. Al-Khadimi believes that the best form of haya' is modesty before Allah the Almighty, and then before people in matters that do not involve disobedience. As for the haya' that prevents one from enjoining good and forbidding evil, or from performing Sunnah acts, it is highly blameworthy, because it is cowardice and weakness in religion, or hypocrisy, or arrogance. In reality, it is a lack of modesty before Allah and His Messenger, for Allah and His Messenger are more deserving of modesty than people. It is advisable to treat pathological shyness and to consult psychological specialists for assistance.