While your suggested answer is gramatically correct and idiomatic, you might want to go back to the question:
Was mögen Sie alles nicht?
→ alles being the operative word here. If you ask for alles, you are essentially expecting a list, in this case a list of things you dislike. (Note that a list may contain only one element, but you need to understand the intent of the question.)
There is no hint of never implied and it is not restricted to activities unless this can be inferred from the context, which we don’t have here. In plain English:
What are the things you dislike? / What are your dislikes?
You may use your answer if watching TV excessively is your sole dislike, but much more common would be something along the lines of:
Ich mag nicht viel fernsehen, keine weichgekochten Eier und keine besserwisserischen Antworten.