What an ending SPOILER (Score 1)

I recently completed the campaign and I found chapters one and two to be amazing (plot wise anyway) however the last chapter drops the ball. It could be described accurately as two hours of buildup and two minutes of anti-climax, battles which were alluded to from halfway through chapter two ended in five minutes and were exceptionally easy to complete. Nothing new was added in the third chapter, opponents you were fighting from level 1 were just thrown at you in ever increasing numbers and it was all strung together with couple of slideshows to explain what was going on and why. To be fair Neverwinter Nights 2 has some large clichés but did they have to turn the king into an endurance test? Repeatedly killing it then smashing up the room is an ending I have seen a thousand times before which I thought could not make it any worse until I watched the ending slideshow.