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You pretty much found the infamous "You don't pay my sub" player. They way they reacted to your advice was clearly wrong. Although, most of us also find that kind of player, the entitled child that think they can do whatever they want. The only thing we can do is to ignore them and move on. If they harass you or insult you, well, there's an alternative route: report them.
EDIT: Also! as a veteran MMO myself too, in this game is when I gave up when it comes to give advice/explanations. People get triggered or they just ignore you. At most I can demand certain things like "Yo, use AoE moves please". But you can guess what happens there too. That's the community we have. It's not the majority but you'll find them eventually.