The main purpose of religion is to keep the masses towing the line by threatening them with come back in an afterlife if they don't behave according to the prinicples of theirr religion. This worked reasonably well in begone eras but most people are more enlightened today, and don't believe...
I don't see any downside to atheism, it is a win, win situation if you believe this life is as good as it gets and there is no eternal punishment, so beloved by some Christians sects. Of course you miss out on heaven if there is such a place, but when you are dead you have no conscious thought...
Either god was responsible for ALL creation or he wasn't. If he was responsible the whole shooting match is down to him. If he created human nature and it didn't turn out as he hoped he can't blame anyone but himself. Tthere is a saying, a bad workman blames his tools. If the Bible is correct...
But if the converse is that a genuinely good person, who is an atheist, goes to hell because of unbelief it is wrong on all counts. Fortunately Christians who believe in that sad doctrine are in the minority.