Why do people avoid getting better at the game?

[Nestama]

Not listen is one thing but I never saw any hostility towards someone giving advice in a positive and constructive manner.

You'd be surprised. It does happen. You phrase advice in the nicest way possible and someone WILL (either intentionally or unintentionally) find a way to read it as condescending.

I still remember when I neutrally recommended a WHM to use Holy III and both DPS jump down my throat and tell me to just focus on tanking (and then the WHM decided to only use Holy III, out of range, and never heal me from then on. Good thing I was a WAR).

And then there was this gem.