OP, I have not read anything other than your original post so perhaps this has already been said/answered, if so I apologise.
If you feel you no longer believe in God then that is 100% your choice and you should not have to justify yourself or your reasons in any kind of way.
I do believe in God, but for many many years, I absolutely did not and was vehemently against the mere suggestion.
There is so much evil around us, it’s no wonder that it’s hard, or for some actually impossible, to believe there is a God that made us and takes care of us.
In the recent months my own faith has wobbled, as I imagine it has for many other believers. However I myself just cannot go back to not believing. It’s there now and I genuinely don’t believe anything will take that away. Even when I am at my most sad and angry.
All I can say, which I have said before on other threads, is to ask you to imagine living in a world with no evil. No suffering. No pain. Initially I imagine it to be a lovely world where everyone gets along. Then when I think about it more, I start to imagine what it would be like to never feel emotions such as the relief when something potentially terrible works it’s way out. Or what it feels like to have hope in the face of adversity.
Some of our strongest emotions comes from experiencing suffering. How could we ever experience true joy, if we never have anything to compare it to? How could we be compassionate if there is no need for there to be compassion?
So I ask myself, would a world with no suffering really be the wonderful place it’s so easy to imagine it would be? When the very reason we can even imagine such a place is because of suffering in the first place? I imagine we people in this world with no suffering to be shells of what makes us human, the good and the bad.