I have to disagree.

The instance design in Dawntrail has been some of the best this game has ever had, I feel. I've been playing since 2.0, not long after it was revived from 1.0, and I don't ever remember any encounter hitting me like some of these new fights, save for maybe the level 89 trial (if you know you know) though that was more for story reasons than design philosophy. Well, and I guess Orbonne Monastery simply because all the bosses are so quotable. The encounters are well designed (though I side-eye the first boss of the Streetwalk and his legion of mascot minions) and require me to use more mental bandwith than anything that came out in the last expansion. I physically found myself unable to do the mental calculations for the line swords in the 99 trial so I opted to rely on a friend and followed them to the safe spots. I was fine.

Endwalker's content was disappointingly easy. It was borderline boring. Whoever was in charge of the instance design team in Dawntrail seriously cooked, but by the nature of the content becoming more difficult it is expected that not every player is going to be able to adjust to it. It is unfortunate that some people have difficulty - it's part of being human. I wouldn't denigrate people who cannot do the content or have issue with it, but equally we have to understand that that fact alone is not deserving of pandering on a broader scale.

FFXIV cultivates a large playerbase of multiple people who all have different desires. Roleplayers, Casuals, Hardcore Raiders, Glamourers, whatever. The devs cannot make content that appeals to everyone, and though far from perfect as a sentiment, it calls to mind what the Helldivers developers said: a game for everyone is a game for no-one. In fact, I was so surprised by so many people criticizing Dawntrail's instanced content, much more so than those who criticized the story - I feel like these are the most fun and engaging fights CBU3 has cooked up in a long while.

Is there an easy answer to this? Perhaps permitting people to clear content with Trusts and no EXP/drops with the Echo ala Unsynced content is probably the best. Removing duties from roulettes is a non-starter because then the queue times for people who are getting through the game will be even longer. I've gotten the Nier raids recently after having not done them for a very long time and while I had to blow off the rust and did die once or twice it's not the end of the world.

But the reality is we cannot have the game's content suffer because not every person can clear it. It cannot appeal to the lowest common denominator. Giving them a way to complete dungeons that are necessary if they physically cannot on their own is one option, but it should not affect the overarching design philosophy of the game for the majority of the populace. Give them tools to succeed, but do not take those tools away from the rest of the playerbase.