Well, with how much subjectivity is involved with perceived difficulty, I don't think the conversation will stay very productive if we go down this road. The game does have something that can help break things down empirically though, something that I invite everyone reading this to try.
The strayborough expert dungeon we have right now has two somewhat notable bosses. I think everyone should be able to perform flawless runs of both of them, tracking hazards solely by themselves, while keeping up an optimal rotation with 100% uptime throughout. I think you should be able to do this three, even five times in a row, no matter the quality of your party (the randomness is part of the fun).
If you've truly become adept at your job, and minimized the effort it takes to pilot, I think this is a reasonable ask. If you're unable to do so, I'd like to gently suggest that in that case, the notion that the job is designed intuitively enough does not hold. I mean, can anyone truly claim a job is operating fine if they are still making mistakes? However straightforward the job was claimed to be, it clearly wasn't sufficient to assist them through this.