Don't despair! It is good that it is still in its nursery pot. That means that overwatering is not very likely.
You are letting it get too dry. It should be watered thoroughly (until water trickles through the drain holes) as soon as the surface of the soil feels dry, not when the top inch is dry. There is no reason to leave the water out overnight. If your local tap water is hard, use filtered or distilled water.
Kentias are easy only in the sense that they do not require as much light as most other Palm species.
Remove the dying fronds and increase the watering and I think you will soon see improvement enough that you can start enjoying your Kentia!
