This is a Chinese idiom which literally translates as the food is tasteless or unappetizing when eaten, but you feel that it is a pity to throw away.
It’s often used to describe relationships which no longer hold much for you, but which you could not bear to forsake. Time to love yourself better and let go. Why waste life, time and empty calories on tasteless food when you should be getting better.
Be more decisive, my dear.