The problem with Twintania isn't that you have to "figure out mechanics" etc, its that once you do (or think you do) you have to distinguish whether your death from mechanics is due to 1) Improper Understanding of the mechanic, 2) Player failure, or 3) Dying due to server de-syncs despite doing the same thing you did to avoid the mechanic the last 5 times it happened.

Unfortunately, #3 happens much too frequently on the later phases of the encounter and makes you question #2, and especially #1.

Also, if you couldn't figure out Allaghan rot in all of like... two pulls... you should probably take a step back and wait on content to be handed to you instead of wasting your time.