DEMONIC * Canada 2021 Dir: Neill Blomkamp. 104 mins Writer-director Neill Blomkamp’s feature debut DISTRICT 9 (2009) showed immense promise unfulfilled by his bigger-budgeted (though not uninteresting) Hollywood follow-ups ELYSIUM and CHAPPIE. This oddly uncinematic, tedious venture into possession horror manages at least one remarkable achievement: it’s far worse than…