I mean the LTV is integral to how like capitalism and exploitation work, so the only "debunking" that ever happens around it is things like "hey why do things cost different prices at different times, markets and exchange are what create value not labour!" which is a point that Marx himself in Capital Vol. 1 calmly explains has no bearing on the LTV. You can't debunk the labour theory of value unless you think humans doing stuff to things isn't what creates value, which is frankly nonsense.