To me, the ethics essentially come down to mirroring Christ in my own life in everything I do; the moral compass is Christ himself in the Christian life. I fail often but that's the goal / struggle. With that, I'd like to know what those outside of the faith find deplorable about the way Christ lived His life?
And I do understand that deplorable ethical decisions have been made by those or the body calling themselves Christians (and sadly, myself too at times). I would say this is a sin / shortcoming of the person or group and not of what Christ has asked that person or group to live like.
James 1:27: "Pure and undefiled religion before God the Father is this: to care for orphans and widows in their misfortune and to keep oneself unstained by the world."
My other issue with Christianity is that Jesus comes off as genuinely unhinged sometimes. For example, when he tells the Jews that the only way to be saved is to eat his flesh, and when they say “surely that’s just a metaphor, how do we eat your flesh?” he says “no, I’m being totally serious”. There are a bunch of times in John where the stuff he is saying sounds crazy even to his disciples. Let me ask you, if someone today came and said those things, would you believe them? The only difference between him and a modern person on drugs is the records of his supposed miracles