This expansion finally has content that makes me think. Endwalker was super easy. The expert dungeons this time around threw me for a loop the first couple runs. The normal raids actually wiped me once.

You've had 100 levels and several expansions to learn the game. The attacks are well telegraphed. By this point you should know to pay attention to the boss's movements and not just aoe markers on the ground. AOE bigger than you expected? Well you know after getting hit by it. Mistakes are allowed to happen. If this is your first expansion even doing normal raids I could see it being a big jump compared to story dungeons, but to that end I'd suggest going back and doing the old raids. Learn the common mechanics recycled through expansions.

You have no one to blame for your lack of ability than yourself. It takes time, and practice. Make mistakes. Hell, stop hitting the boss if a mechanic is confusing you and focus on the mechanic. It's normal mode. Stop ranting about how things need to be easier for you when the bulk of players have no issue with it. The vocal minority should not get to ruin optional content for everyone else. If you can figure out the forums then you can figure out using google and youtube, and seek out resources to help you improve.

I'm sorry you had a rough time, but you said you can learn a fight. So are you really complaining about the difficulty being a step up from Endwalker, or are you complaining that on day 1 everyone was in the same boat as you, and learning the fight for the first time? Just genuinely curious given the amount of resources online, and how the game itself has taught players over the course of multiple expansions.