Some reasons people have for believing in God in the first place include: 1) the fact that anything exists at all rather than nothing - SBF
This is wrong for at least two reasons. Firstly it requires wilful equivocation regarding the word 'god'. If the fact that anything exists did suggest a pre-existing being that leaves us a very, very long way from anything theists could call god. You would still have all your work ahead of you.
Secondly the mystery that anything exists rather than nothing is only exacerbated by positing an equally mysterious pre-existing being.
2) personal experiences or encounters with the divine
So the apologist whose argument rests on the fact that humans are frequently mistaken and misled by everyday personal experiences of the natural world, thinks that personal experiences count as evidence for a supernatural being. Don't you see the irony?
And which 'god' is personal experiences evidence for? If it counts as evidence for the god of christians then it must equally be valid as proof of every other god - and of alien abductions for that matter.
3) indications of God acting in and through human history
Every single detail of history and of the living world screams that there is nobody in control.