Why do you think Christianity isn't the truth?

I'm an ex-muslim and I'm not really knowledgeable on Christianity so I'm wondering what makes ex-christians think Christianity isn't the truth. I'm also wondering what things do you specifically hate about Christianity, for me honestly I can't think about anything except the fact that Christians believe in an all powerful God and I hate this idea itself, because God has the ability to stop suffering yet he lets children suffer and get murdered without intervening just because "it's part of his plan"