I get your point and totally agree that direction isn't followed NEARLY often enough, but I personally find it to be open to interpretation whether what they encounter is truly "hell" in a biblical sense or just an alternate dimension that can be construed in such a way that anyone who's ever heard of the concept would define it as hell, and I prefer the latter at least in my own head.

If you look at it through the lens of it not really being Hell Original (tm) it becomes almost Lovecraftian, given that everyone who comes into contact with the dimension loses their minds and that the ship itself gains a kind of sentience having just passed through it, but the comparison to Hellraiser is definitely valid given all we see of it is just wanton violence amongst the ship's original crew, so for all we know it could be straight up Satan driving the boat.