I understand what you are saying. This is useless advice unless accompanied by some practical suggestions.
In my opinion, no. It's okay to feel angry, sad, upset, depressed, emotionally drained etc. Just like a person needs time and space to mourn the death of a family member in the same way he should be allowed to feel dejected, hurt and so on. Fighting these emotions is counterproductive. Moving on can come only after acceptance, you will find a solution only after you acknowledge a pro