Like I've said 100 times, this is the outcome of easy/simple class mechanics. You can type on google "(insert class) rotation FFXIV" and after some practice you're just as good AT THE CLASS as most people. You may not be able to dodge well, you may not be able to keep tracks of lots of things, but at its core, you are as good AT THE JOB as most people.

To make up for such easy class mechanics, you have to make the boss mechanics hard.