Above is a video from a channel from someone who clearly used to be a Christian and is now an Atheist. I think that this video is important because he points out some true points. If you judge others' sanctity by how much they know or understand about theology, doctrine, or history you will invariably be in the position of being lonely just like the video suggests. If you judge yourself in any way by any metric you will find yourself in this horrible place. This isn't a problem with being a Christian or following the Bible. It's a problem with pride and stupidity of people. If you find out that your Christian life looks like this, you must realize: YOU ARE DOING IT WRONG!! You are not looking at other people the way God wants you to look at other people. For example
3 Let nothing be done through strife or vainglory; but in lowliness of mind let each esteem other better than themselves. - Philippians 2:3
This means that God does not want you to think of anyone as being better than other people for any reason.