Originally Posted by
Valence
Healers arent the most squishy no, except perhaps SGE.
A MNK shouldn't be able to run down someone on their own, especially not a healer like WHM. Even with LB up they'll need support. They can run down someone if they chase someone that's about to die though, but not consistently harass someone for ages and kill them like that. The real issue is that your friend doesn't know how to defend properly, was probably totally overwhelmed under pressure, and didn't kow how to rotate between potions on the map, and her team was probably also totally clueless as Aravell suggested above. In short, that MNK exploited her lack of experience.
Is this a solution to help new players? No, but that's a hint of what to improve or how to deal with it. In a lot of pvp competitive games, players unfortunately have to face things and strats that feel like a shit sandwich and generate a very unfun experience, but the good mindset would be to try and see how others deal with this and how to address the problem oneself, and not to necessarily condemn the mode because "feelsbad".