Will Allah reveal the sin I committed after repenting from it, especially after someone reproached me with the description "misguided and misguiding" even though I repented from the sin?

Allah is not obligated to expose the penitent, and it is necessary to conceal one's sins and not inform anyone about them. If you repent from your confession, then this is what is required. Whoever accuses you of what is not in you, or shames you for sins you have repented from, has done wrong and committed an injustice. Shaming a brother for his sin is a greater transgression than the sin itself, and it is permissible to describe you as misguided and misleading. The affairs of a Muslim must be presumed sound, and it is forbidden to harbor ill suspicions.