I can understand the journey, what I don’t understand is the lack of self-awareness around it.
Early trauma and the violation of the Borg explain the change in emotional regulation, but the arrogant lack of ability to take a step back and evaluate his behaviour from the perspective of his own values and previous expectations about behaviour are what I find surprising.
Who better to be a foil for a Vulcan trying to button down and gain the respect of Vulcan Exploratory leadership than a bunch of Betazoids who know what T’Lyn’s feeling and have no patience with her attempts to cover up with logic?