Traditionally the Paladin has been a non-starter in Ravenloft, Clerics have always suffered. It's tougher for some classes and alignments than others, always has been.
And, as I said before, it's his game, his rules. That's how he wants to show it, if enough of his group don't like it it won't last long. Lobbing toys about isn't going to make the process go any faster, and when it comes down to it, if you don't want to play in those circumstances the world isn't going to end if you do something else instead. Life is too short to play games you don't like.
The other side of this is that the way 5e is unfolding, this is going to happen more often than we're used to. The whole emphasis on DM fiat when it comes to the rules is going to take a lot of getting used to for some.