from skimming it, his main argument is that Kyber relies on many constructions (e.g. cyclotomic polynomials) that are actively under attack - researchers have been successfully chipping away at them and show no signs of stopping.
he also alleges that NIST have been moving the goal posts to favor Kyber, and they've been duplicitous in their narrative.
he favors NTRU, which iirc isn't his.
