Paladin's take next to zero skill to use, and therefore attract a lot of attention from unskilled players. As a result, you'll find that they're extremely common, especially in Wotlk. They have a ton of oh-**** abilities for when they **** up, which they presumably will because 99% of them are absolute garbage at the game, but there is a trade off to having so much forgiveness for bad positioning, and poor ability choice. Retribution in particular isn't very viable in arena during this time period, because they don't have very good gap closers for ranged attackers, and they have no way to interrupt an enemy player aside from wasting a very vital cc ability that isn't on a very short cooldown. In 1v1, rets are extremely strong due to their ability to completely reset the fight, but this is also your time to either leave, or reset yourself. I'm a rogue, so it's impossible to beat any ret as long as their IQ is over 50, so I usually just spam /lol at them when they bubble and leave if it's not in an arena. What class do you play?