About that Arwen quote, it has always seemed clear to me that this wasn't a factual complaint about a lack of good ferry service or maybe the selective racism of the ferrymen (ferryelves?) shooing away smelly naturalised humans - but a more metaphorical expression of her love and loyalty.
There are no ships that would take her anymore because she meant it when she made her choices. She had cast her lot with the humans and she is steadfast in her resolve. The ships are for elves, maiars, and select heroic individuals destined for immortal existence in the <totally_not_valhalla> - and she identifies as a mortal human (it's who I am, dad, don't try to change me!). She would not board one because that would make her fickle. Devalue the relationship with Aragorn from worthy of the greatest sacrifice to a summer fling in Middle-earth. On his deathbed Aragorn urges her to forget her vows and save herself - because he loves her so much. She refuses - for the same reason.
It's the greatest love story ever told, gosh darn it.