What do you consider narcissistic behaviour?

I don't think that is. It's a little conceited, and could be a trait of a narcissist, but not that alone. A narcissist is someone who cannot accept responsibility for their own mistakes. A person who can do no wrong in their own eyes. It's a person who has a false sense of entitlement and thinks they're better than anyone else and deserve more than other people do. The narcissist is incapable of apologizing or admitting wrongdoing. They have no capacity for humility, and acknowledge no one higher than they are. They are always right about everything and will happily tell you how to conduct your life according to their opinions. They hyper criticize others but cannot be criticized themselves. They are often bullies and cowards.