The PLD was ignoring advice and by the sounds of it being generally unreasonable, the kick should have happened earlier instead of right before the last boss, because that makes Kaldea look bad because it was a kick of spite and nothing more. Because mind you they did make it to the last boss and it's really so easy he could have held aggro with just shield lob anyways. Still bad, but possible.

Just makes it sound like Kaldea pushing of the "I want to coach you" idea is just them trying to not sound so bad cause they had initiated the kick even though the other players were being quite rude from the sounds of it.
Either way the PLD needs to get good and Kaldea need not kick before the last boss unless it is for spiteful reasons, and if it is just own it don't muck around trying to look like the better person just makes you look worse.