I get the impression (maybe mistakenly though?) that Huw is one of those welcoming Brexit partly on ideological grounds. Though with his previously cited City background, he may also have been astute enough to have reduced investments in UK-centric stocks & increased stakes in dollar-earning global stocks. If so, his position becomes a bit more comprehensible, as opposed to all those hardcore Brexiteers living in straitened financial circumstances, habitually cursing their lot in life.
However, if his glee is just an anticipated schadenfreude, then indeed that seems rather sad. - Regards. Edit: Corrected typo in “straitened”.