See, there's a difference between elitists and hardcore players who understand it takes a good level of competence and optimization to do savage content... and just doing the BARE MINIMUM of your job that you should have known for 70 levels now.
This for example.... should not be a thing. You shouldn't be allowed in an expert roulette with gear that isn't 80. You shouldn't NOT know by now that you've had aoe skills for 70 levels now and use them in every single dungeon to clear trash mobs and mass packs of enemies. But, because there's no content in the MSQ that forced the player to go "oh, I can't do this, I'm too weak, maybe I need better gear" or "well, I'm not able to kill these for some reason because they keep respawning, maybe I can kill them all at once?"... or ANYTHING that requires a player to think. This is what we're subjected to. I'm sorry but no, it's not okay that at this level and this far into the game after this many dungeons/instances a player is allowed to be a complete idiot and be rewarded for it. This could be said that just the player's fault here.... and it is. But SE isn't helping by making content more and more "casual friendly" and giving people all this room to just stomp on everything with less than bare minimum. PF or duty roulette, you'll find people that are this bad and they're allowed to be and again... REWARDED for it. Imagine doing a normal trial roulette (one without a platform you can fall off of) and dying every single time to anything, you don't do dps, you waste the healer's mana in ressing you, and its all because you either A. didn't bother to put on armor because somehow you can get away with doing this... or B. decided "eh, I don't care, if I die, I die, it's just another roulette. I'm sure everyone else will handle this just fine".
Trying to learn and still dying, fine, you're giving effort and power to you if you actually chat and ask how to not die to a mechanic. But purposefully not trying to utilize your tools given to you by the job you picked? You're hindering everyone's time and progress doing that. It's selfish and borderline can be considered harassment given the circumstances. Everyone by level 80 should know what a stack marker means, and know that mitigation is needed for tanking or they will die no matter how much healing is given. Unfortunately... that is not the case because of everything I've mentioned prior. You can be a tank, put on the stance, and spam 1 GCD, not a whole combo, but just 1 GCD and you will be "just fine" so long as your healers spam heals on you. You don't have to improve worth a damn, mitigation? Who needs it right? There's a point where this game should push the player to understand they have to start figuring things out, look around, recognize patterns, or ya know.. bare minimum.... know what their job does in order to clear content..... but if you can already clear the majority of content without 80% of your skillset... Then I guess GG. the fight takes 2 hours to finish cuz of that, but hey... you still "win" because bare minimum effort and lack of comprehension through SE's lack of tutorial and guidance.
There was a time in SB where we fight Sadu and it forces us through an endurance test. It was difficult as a solo instance, you had to dps well enough but also understand prioritization of dps. What things needed it when, and where. A very simple basic thing we learned back in HW I feel like. It made me have to really dig into learning how to do decent dps as a tank(or ninja, I can't remember, I failed to it quite a few times). Despite that difficulty, I appreciated it immensely upon finally clearing it, because I earned it and because I learned something about my job(s) for myself first hand by myself thanks to that instance. It was rewarding, my reward? I got to progress further into the MSQ and see more story I enjoy. What happened soon after? They nerfed it, which.. fine, understandable, it was pretty hard even for me. Then on top of that.... easy and very easy were offered as difficulties. At that point, what's a dps rotation matter? Why should it matter what I target? What order, why I'm dying? Who cares if all it takes is less than nothing.