It is by FAR the part of the game I hate the most. I do so little damage underwater I am really starting to think I am doing something wrong. I can crit for 2.5k on land, but when I'm underwater I hit for 100. Dealing with more than one mob is means I'm dead most of the time.
If I never had to fight underwater again, I would be happy.
And I don't know how to make a poll. =\