The main problem is the way the house is playing the game. If you even try to play a strategic or physical game, you're going to get the boot. A lot of people see this, and as a result, they don't do anything! Although Kieren is playing a really bad game, he's giving the producers something to work with, hence why we have this Kieren show.
There's more to it than that. Otherwise he would not have been chosen for the pivotal secret task on night one. As said well above:
It started from the very beginning with him being pre-selected for a pointless opening night task which added nothing to the show other than boosting the profile of Kieran. It meant the first 15-20 minutes were about Kieran, not about us being introduced to the other housemates.
I think we were all meant to be enchanted. These other people are so far (Xavier aside, he seems interesting) so lemming like and dull (even sweet Ian likes to cling to the dominant pack) but they still deserve the dignity of being known, after six episodes, as more than extras in The Kieran Show, wacky installment number 2,035.
Angela has had her own to the forefront edit, but one can see the reason for that. I can see no reason to have Keiran's antics or DRs thrust on me every few minutes of every show.