So I looked it up and he's saying it's due to knee problems.

Perhaps the knee problem is why he doesn’t genuflect, so maybe he should be given the benefit of the doubt in this specific regard, rather than presuming contempt for Christ?
I know traditional priests who can’t genuflect because of physical maladies (eg., Fr. Iscara, SSPX).
Then again, Fr. Iscara never put a beach ball on the altar, conveying the notion Christ’s sacrifice and torture was a festive and jovial occasion.
Still, the publication of his knee problems seems more than sufficient to preclude a rash judgment that he’s refusing to genuflect out of contempt.