Thinking you have are the main character is the worst form of ego many have...

In my life I've found myself having a huge ego when coming to other people...

I found myself blaming myself for people getting acting different, forgetting that they have other things going on in their life. This alongside setting egotistical goals like earning 100k in my first year of working are all an effect of main character syndrome, which is very unhealthy for both the mind, and your progress.