Anger often enters the deconversion story before the formal arguments do. A person feels robbed, controlled, humiliated, or frightened, and religion becomes the nearest target. Some of that anger is justified. Harm should produce moral protest. Islam does not ask the injured person to call wrong things right.
The harder question is what anger can and cannot tell you. Anger can reveal violation. It can expose hypocrisy. It can energize a necessary break with abuse. It also simplifies, overgeneralizes, and seeks a total object on which to place a scattered wound. When that happens, God becomes answerable for everything done badly in His name.
The honest path is to preserve the moral insight without enthroning the feeling. Ask what precisely deserves blame: parents, institutions, cultural scripts, selective preaching, your own expectations, or the truth of Islam itself. Tawhid asks for that discrimination because truth belongs to God and cannot be safely judged through one burning emotion alone.