I agree we should help them improve, but those players should also be responsible for their own actions. I have met so many Dragoons that do not bother with Heavy Thrust, Tanks that refuse to use the defensive buffs when pulling big groups, healers who do not use their buffs and only use 2-4 skills on their hotbar.

If a skill provides 15% increase in damage and you are not using it, this means that you do not care about dealing as much damage as possible. If the underpreformer does not care, why should we?