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?
“Soul Annihilation” is a cute buzz word used without thought or meaning to overly simplify and dismiss a complex theological concept and I reject it. Immortality and Immortal Souls are equally overly simplified. Our souls did not exist before the bodies were formed and its continued existence, Eternal life, is offered to us conditionally. Annihilation, like creation, is a power reserved to God alone, and by an exercise of His absolute power He can reduce the soul to nothingness. The wages of sin are indeed death.
That you continue the charade of speaking for the Church and Catholics by snippets and excerpts from the Baltimore Catechism and "snippets" from anti-Catholic sermons from equally ignorant sources is at best pathetic.
In paragraph 1861 the 'Catechism of the Catholic Church describes hell as 'eternal death'. It further states in paragraph 1035 that 'the chief punishment of hell is that of eternal separation from God'.
The Church, as defined by St Thomas Aquinas, teaches that 'eternity’ is the full, perfect and simultaneous possession of unending life' (Summa Theologica I, question 10). A complete and permanent separation from God is the antithesis of eternity and everlasting life, in other words, death.
In the Collect (opening prayer) for the eighth Sunday after Pentecost in the Tridentine missal, we find the words 'qui sine te esse non possumus', meaning 'we who without Thee cannot be (or exist)'. The logical combination of these two citations together at least suggests annihilationism. Although not explicitly approved in Catholic teaching it is not specifically dismissed.