Not so. Those who have forsaken Christ and forfeited the eternal life of Salvation are dead.
Soul annihilation is in direct contradiction to not only the clear teaching of Jesus, the clear teaching of the Bible that the Catholic church claims it wrote, but also the clear teaching of the RC church in the Catechism of the Catholic church, as found at vatican.va.
Since you have previously stated that you believe in it anyway, you have disqualified yourself from having any authority to speak on the subject of life and death in the world to come.
What kind of sin is it to reject the doctrines of the Catholic church? Mortal or venial? How long a stay in purgatory do you expect for it?