So a basic opener is inflated in an Extreme Trial fight? That's literally the barest of minimum expectations to have of anyone.
Could they have been a Black Mage, Bard or Machinist per chance, all of which had cast times in Heavensward, and in the case of Black Mage, very minimal movement tools? If so, they were likely upset someone baited a Flare Star AoE near them, which focused excessive movement. While not something to rage over, it's certainly annoying, and yes, worthy of being brought up. Perhaps instead of defaulting to calling someone a tryhard if they show even the slightest interest in maintaining their damage, you might notice these things. Granted, they could have threw a gasket, though based on your responses in this thread alone. I suspect it's you making them out to be the bad guy far more if only because in less than a paragraph, you've insulted them several times.
And now we see you throwing "elitism" around for even the slightest disagreement. Not everyone wants to perform at the barest minimum and just "get by". If a party advertises "Skipping Soar," then by joining their party you're agreeing to such a prerequisite. If you aren't capable of doing so, you have no business joining. That isn't elitism but simple courtesy. If there aren't any parties available tailored towards your preference, make your own. If it doesn't fill quickly, then the community has spoken.
Speaking of which, what the devs intended is, frankly, irrelevant. The community decisions what standards exists. A prime example is healer DPS. The dev team never intended for healers to contribute large amounts of DPS. In fact, Yoshida infamously claimed they don't calculate healer DPS at all despite releasing Gordias and Mids, which were downright impossible without. That statement has since but walked back to claim they don't calculate healer DPS outside of early week prog, or at least not heavily. Regardless, the community has more or less thrown out that entire philosophy be it due to equal contribution arguments, lackluster healing design both mechanical and encounter wise or simply adapting to the systems given.
That last statement is important as I can flip your argument and say if they didn't want players setting higher expectations like Skip Soar. They shouldn't have put it at a HP threshold low enough players can easily skip if they're reasonably competent at their job. Expectations don't arise out of thin air but from adaptation within the game rules.
My issue with this mentality is that hypothetical Black Mage only cleared on the backs of better players putting in a greater effort then they were willing to. If everyone shared their mentality, they wouldn't meet the DPS check, no matter how generous. Therefore, why is it okay for players to essentially leech—queuing into content woefully above their skill level—yet players criticising them for doing so are "elitists"?
Put another way. We all started off bad and/inexperienced at some point. Except some of us opted to learn how to improve. Why can't others if they want to attempt harder content?
Your definition of fun isn't the holy grail. I'm not particularly keen having someone like the aforementioned Black Mage waste my time in Savage level content because they can't be bothered to put in any effort beyond the barest of minimums. It's disrespectful to upwards of seven other people who are attempting to clear say, E10S, but now have to deal with more mechanics they may otherwise have skipped or risk things like damage downs or repeated wipes due to someone having no idea what they're doing.
And your now shifting the goal posts. We aren't talking about new players and you know it. People weren't demanding Skip Soar and whatnot in learning parties. Most people are far more accommodating in a learning party, provided you're there to learn the actual fight and not your job. It's when players who don't know their job join clear/farm/two chest players that upset people as they have business doing so.
Scenarios like Mikey_R are not "extremely rare" if you frequent PF whatsoever. They are, in fact, quire common. Hence why it's been a continuous talking point for several years. Hell, I only just saw someone on stream who when told to upgrade their i500 weapon (last tier BiS), they promptly responded with "Why? Who cares?" This was in E11S, by the way. And with your logic, since they cleared they're above criticism despite using outdated gear.