Even the relatively recent Gods often seem only "good" in the sense "yeah, he does some unpleasant things, but if you call him evil, he will torture you, so it is better to call him good". Essentially, a supernatural Stalin with omniscient secret service; of course you would only speak positively about him, regardless of what he does.
It is fine to say that religious claims are false; it is not fine to substitute strawman claims and say they are the real claims.
The notion that God might be evil is not a mere "strawman"; it is in fact a feature of some actual religions, notably Gnostic Christianity. Of course, the Book of Job in the Hebrew Bible seems to aim at refuting this very argument, since it freely admits that God often appears to be evil from our point of view; but since he is infinitely wise and knows so many things which are entirely beyond our understanding, and has done plenty of nice things for us besides (such as laying the foundations of our very world), how can we argue against his goodness?
The premises of Pascal's wager are normally presented as abstract facts about the universe - there happens to (maybe) be a god, who happens to have set up the afterlife for the suffering of unbelievers.
But, assuming we ever manage to distinguish trade from extortion, this seems a situation of classical extortion. So if god follows a timeless decision theory - and what other kind of decision theory would it follow? - the correct answer would seem to be to reject the whole deal out of hand, even if you assume god exists.
Or, in other words, respond to a god that offers you heaven, but ignore one that threatens you with hell.