They Have a Sense of Entitlement
When your partner does something nice for you, they feel entitled to praise or a reward, like a little child or puppy. They are not doing something nice out of the kindness of their heart, but rather to get something from you. Furthermore, if you do not reward or praise them they feel it's their entitlement to hurt you. If they have been hurt or dismissed in any way they feel it's their right to retaliate. They will become angry and irrational, all because you didn’t notice they cleaned the sheets or something similar.
Do not feel that you need to follow them around praising them all the time. That is not normal for a relationship. It is a sign that they are trying to control how you feel about them at all times. They should want to do sweet things because they love you, not because they think they will gain something out of it.