I'm sorry to hear about this I could have sworn FF14 had something like this but I guess I was wrong.

I know how crippling Arachnophobia can be for people and it must be very traumatic to engage with a boss or an enemy that incapsulates your greatest fear.

I hope this situation gets addressed and heard so you can continue to enjoy the game. Hopefully bumping this thread will get it seen by the proper eyes. BUT if not I'd also suggest posting on the FF14 reddit only because I know the devs pay extra attention for social media posts. It'd also help if the issue was presented in different places for the most reach.

Again I'm truly sorry you had to endure this. Let's hope we can get that fixed, I'm not sure what that fix may look like but it's important for people to enjoy this game.