Literally the only "difficult" mechanics in this fight are Divebombs and Twisters. The rest of the fight is an absolute joke if you can learn to deal with these two very simple mechanics. Divebombs, just get in the pit...see the mark? Run out of the pit. Rinse/repeat. That's it. Twisters. See that cast? Run around, just don't back track or run into anyone else. Easy.

Stop using the duty finder then complain when you end up with a team of chimps then claim you can't beat it because it's "too hard." Throw up a party finder and don't be afraid to kick people who clearly don't know what they are doing and aren't willing to learn. That said, I agree with what others have said. If you can't deal with the only two marginally difficult mechanics of T5 you're gonna get even angrier when you try to hit T6 and T7, much less 8 and 9. T5 is a walk in the park in comparison.