This criticism of Pascal's Wager, based on Pascal's personal views on another subject, constitutes an ad hominem fallacy. One need not be a determinist or predestinationist in order to make a Pascal's Wager argument. As such, it is and invalid, rather than decisive, response.
Free will and determinism are a conundrum that can be raised against any reasoning or argument presented by a determinist, as the presumption of an "argument" is that it can affect one's decisions, but determinism implicitly precludes this. Determinists have split over how to respond to this apparent self-contradiction -- some include the arguments and their effect on minds as part of the determinism, while others admit that they live their lives on the presumption of free will while intellectually holding by determinism. There is an even greater tension with predestination and monotheism, as the validity of any individual agent's apparent will is both suspect, and theoretically irrelevant, under either. This counter is a better counter to belief in determinism and predestination, than it is a counter to Pascal's Wager.
Pascal's approach to faith is tentative and conditional. If his approach to predestination was similar -- IE he assumed it was true based on best evidence, but was uncertain -- this argument would not even be useful as an ad hominem against Pascal, as his tentative reasoning would have no self-contradictions.
A more fruitful critique of Pascal's Wager is that it presumes a God who is unaware of one's true internal certainty, but only cares about outward professions of obedience. Jesus's consistent condemnations of hypocrisy suggest a God who is NOT interested in outward/public views, but only inward ones. Combine this with Omniscience, and Pascal's Wager then becomes either irrelevant, or perhaps even more reason to be condemned.
Another, also fruitful critique of Pascal's Wager is that it assumes a false dichotomy -- belief in one theist doctrine, which presumes a jealous/punishing God who rewards public obeisance, or rejection of all theism. We instead have tens of thousands of different theist claims and worldviews. The in this actual circumstance, the Wager would advocate for adhering to the MOST jealous/punitive of all theisms. The Wager also presumes no risk to mouthing faith one does not believe -- which not all theisms claim, including narrow path or "elect" Christianity. As well as, for an extreme and fictional example, Cthulhu. The Wager therefore is an argument for public profession of belief in the most the most vain, and jealous of all Gods. Noting this to a Wager advocate, is in my experience a very effective counter.