Not really objective here as I'm the creator of Joust (long, LONG time ago), but
The point of Joust is to drive the other team to their own side and pin the flag, that is why it is called Joust (like two people fighting eachother on a beam trying to reach the other side) and is for the most part a question of luck which adds to the 'fun' as it isn't really skilled based which seem people to enjoy every now and then.
I think it is up to the players what they want, and if the map is voted for that frequent it speaks for it self that some, or even most people like the change of pace the map brings every now and then in the map rotation.
You could just spectate if you don't like to play on it and enjoy the other 5 maps it takes for the map to be available to vote for.
I don't think it is a good idea to delete popular maps just because 'you do not enjoy them', even if it is a map I created, or any other map for that matter.
