In Disneyland, there was once (maybe still is?) a car that kids could drive around a little track. You could steer side to side a little (maybe a foot or so I guess), but you’d keep moving inevitably along the track no matter how you steered. You could not decide to drive, for example, to New York.
It seems to me that the doctrine of free will is much like that. Those on the path to Hell have a little wiggle room: they can struggle to do good one year, revel in their sinful pleasures or evil deeds the next year, and so on. But in the end-- Hell it is, and not Heaven. If Hell is the road they are on, at Hell they will arrive. This is because the final destination is already known to God, and God’s knowledge represents the Truth, perfect and immalleable.
Now, if I was designing a Disney ride, I wouldn’t make the car drop off at the end of the line into an eternal pit of fire, and blame the kid for not steering toward New York instead. That was never a real option, was it?