And this is why I call Garuda the Gatekeeper of Final Fantasy 14 ARR.

Garuda basically test players in the three trinity of a prepared character: gear, role, and patience.

If the player does not have all 3 traits then they will never get past Garuda.

Gear - being properly geared for the fight

Role - knowing your class/job role and what you need to do.

Patience - have the resolve to keep trying again until you win and wait out certain stages of the fight so you can start attacking the boss again.