If you believed it, you still would. That's just the way it is. Once Christ saves you, you can't unsave yourself. Once He turns your heart to belief, you can't unbelieve.
There are just entirely too many people out there who think it is within their power to save themselves and then unsave themselves if they don't want to believe anymore.
If you don't want to believe anymore, question whether you ever did.
That's religion. That's ritual. Anybody can follow a task list of things to do. Do a bunch of church tasks and reading the Bible doesn't make you a Christian anymore than barking makes you a dog.
To be a Christian demands that you confess and repent of your sins and accept Jesus Christ as your Lord and Savior. He died on the Cross, was buried and resurrected on that Third Day so that you would not have to spend eternity in hell. It's about letting Christ be your forever sacrifice and growing in your relationship with Him because of what He did.
If Jesus Christ saved you, there should be evidence of a changed heart, not just a change of activities.

I'm saved and washed in the Blood of Christ. My sins have been forgiven and I am forever His. I don't know about the rest of Christendom's certainty, but I have it on the assurance of The Living Christ that I have been saved. And I can't deconvert myself from that which I didn't convert myself too.
People are saved by Christ. If He does the saving, it is impossible for us to "deconvert".
I think you, like a lot of folks, confuse religion and ritual activities with being saved. They are not the same. They will be a lot of folks who go to hell because they think their "good deed checklist of activities" warrants it.
But God has purposely said that
8For it is by grace you have been saved, through faithand this not from yourselves, it is the gift of God 9not by works, so that no one can boast. Ephesians 2:8-9
Salvation is the gift of GOD not of man. You can't do good works and save yourself, and then stop doing good works and unsave yourself.
If you have not confessed and repented of your sins and accepted Jesus Christ as Lord and Savior then there is no list of good works that can keep you out of hell.
What you know are "ministers" who never knew Christ. Ain't no deconverting cause man cannot convert himself. That's a work of GOD.
Doesn't matter. they could call themselves the Queen of Sheba and it wouldn't make it so.
The Bible speaks of such people who felt like they were doing such acts for Christ. But in Matthew 7:21-23, He makes it clear that these folks who thought they were Christians just because they did a lot of Christian activities will be cast away as evildoers.
21"Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of heaven, but only he who does the will of my Father who is in heaven. 22Many will say to me on that day, 'Lord, Lord, did we not prophesy in your name, and in your name drive out demons and perform many miracles?' 23Then I will tell them plainly, 'I never knew you. Away from me, you evildoers.
Sure I can. God is God alone. You can't deconvert from that which you didn't convert yourself.
The Holy Spirit delivers truth. And if you're dealing with the Holy Spirit, It is nt going to deliver anything that contradicts the word of God.
Who said they prayed? God's word is pretty basic as far as what it says. It's men and their "interpretative" skills who author the confusion. That's why folks would save themselves a lot of trouble if they would just deal with what's on the page first.