Does fear of disbelief due to intrusive thoughts (waswas) in uttering the word of God (Allah) and the Takbir, in addition to delusions in pronunciation, and the feeling that guidance is distant because of the sin of masturbation, lead one to disbelief?

We advise the esteemed questioner to disregard the obsessive thoughts (waswas) that harm and do not benefit, for waswas is a severe illness and an incurable disease. Indulging in it leads one to perplexity, pathological doubt, distress, and legal difficulty. Just as one must fear falling into disbelief (kufr), a servant should not be obsessive, accusing himself of disbelief for every little thing. It has been established that whoever's Islam is confirmed with certainty, it is not removed by doubt. A Muslim does not disbelieve unless he commits a saying, an action, or holds a belief that the Qur'an, Sunnah, or scholarly consensus has indicated to be major disbelief (kufr akbar), along with the fulfillment of the conditions for declaring someone a disbeliever and the absence of any impediments. Fear of disbelief due to a desire for excessive eating is not considered disbelief, because while excessive eating is often a characteristic of a disbeliever, it does not mean that one who desires it is a disbeliever.