Because it makes it even sweeter when you fall over and we don't? Obviously.
Massive chip on the shoulder. Childish really. Maybe you should check out exactly what you have not achieved. Every club has bad seasons. Think you have had a lot more in the last 20 years.
Supporting football clubs = just a big collection of chips on each fans shoulder. That player you hate because he fell over that one time? Chip. That player you hate because he moved clubs in search of a bigger paycheck? Chip. etc etc.