This is important for me, so please help with the most rational sense because I'm willing to convert my beliefs, just atheism hasn't yet provided anything big.

To start with something very simple atheism has a problem with God might being real, but christianity doesn't have almost any real loss with God not being real and in some way it would seem that anti-christian would just consider it a lack of honor to take this as a legitimate argument.

Second apparent thing is of course objective morality, seems that atheism should believe ethics without any evidence that there is any apart from what modern culture has adopted from Bible.

I have looked around long for non-ignorant atheist arguments against, but it usually stops at one essential point where people haven't read Bible or haven't tried to understand it (it's a complicated book, but most people believe they get it without ever struggling for it). I've heard really smart things too though, so here I try to find more.