Non-Christians seem to have this idea that Christians think they are perfect. When actually Christianity is the exact opposite, Christians realize that they are sinners. But non-Christians don't understand this because they aren't Christians, so all they can do is criticize Christians.
All people are sinners, from the moment they are conceived, until the moment that they die.
Out of Love, Jesus paid the penalty for our sins.
We are not able to save ourselves from the penalty that we deserve, so instead we accept that Jesus has paid the penalty for us.
He went to hell and back for us.
Just say, "Thank you, Jesus."