Manager asking me for kt

In my company I am handling a complex project single handedly for last 2 years. My manager promised me promotion and good rating this cycle, but as it has come, nor was I given promotion nor good rating.

I was really upset and told that to manager. manager tried to explain me that he really fought very hard and he had nothing else to do.

Now he is literally asking me everyday for kt on the project I have been handling and asking me to take session for other teammates on the project so that they can also help me if needed.

I am smelling something fishy here. What do you think I should do ??