I tend to agree, it sounds rubbish and it shouldn’t let that much water in, I normally only open my Pro IIs up every 3-4 months (rather than 6-12 for Bulbs and XCs) and they normally only need a bit of a clean, although my SS hub does let more water in, but as I said I think that one needs a new seal now as it’s baggy.
If you’re at the point of binning it then I would send it back to them and see what happens, cos if there really is something wrong with it they will sort it.
It’s doubly frustrating when you’ve had older Hope hubs, I’ve not been that impressed with Pro IIs compared to Bulbs and ti-glides some of which I have still running on original bearings form 10 years ago and one non-disk ti-glide from 94/95 which is still going strong.