Do troubles and worries befall one who maintains her hijab and dress, and memorizes the Quran, due to disobedience to parents, backbiting, and ill manners, while those who are not committed enjoy good relationships with their parents, good morals, and a life free of problems?

Accusing oneself and fearing hypocrisy are signs of good, for the Salaf used to fear it for themselves. Your commitment to hijab (definition) and memorization of the Quran are proofs of your love for good. Your feeling that transgressors are not afflicted by problems is incorrect, for a transgressor may be tested with worries and psychological distress, and Allah may gradually lead him on with blessings then destroy him. Praise Allah for what He has given you, and ask Him for well-being. Do not be deceived by the outward appearances of people, and look to those who are below you.