Did you ever consider playing a different job then?
A BLM for example? Mapping out the fight properly is something they have to do and you can do for yourself.
And what are you exactly criticising here.
Cooldowns line up for a reason. In WoW as well.
0:30, 1, 1:30, 2, 3, 5.
etc.
What did endwalker even change in that regard.
And I don't know about that hitbox thing. That too didn't really change.
It's about mechanics were you lose uptime, honestly though, it's not even something I want to have because it's actually bad to have forced downtimes.
something like Hunger in P5S isn't exactly something I like. If you are 1 GCD late or early it's always awkward, especially since you are reliant on other people's buffs, like a dancer might still dance and you are already sitting on the 1000+potency finishers. I can fix all of that alright, but it is still something I have to think about if I care about DPS (which I don't, in most cases because it's not like enrage is whats holding my people back)
But still, compared to what I did in classic or actually even do in retail for example it's hardly different.
Popping CDs as they come up or as a dps window allows it. It's a cooldown, there is not much about it.
I still feel priority lists are easier to "maintain" than proper rotations, especially when they are quirky like SAMs or BLMs due to movement and server ticks or slidecasts, or simply due to how the "combat-point" system is designed etc.. Sure, we can blame the game for the latency, but I actually think it's kinda cool to be able to slidecast - although I'm aware that I'm a minority here, feels good though.