That depends what you think the greatest threats to quality of life for the average in American are. I believe the greatest threat is the corrupt system, which gives more power and money to the rich and screws over almost everyone else, and both of those candidates are firmly entrenched in it.

They both know and embrace their role in that system, although they would phrase it in different terms.

Finally, you asked about objective terribleness. But there is no such thing. This is all subjective, because of course it is, the country has hundreds of millions of residents who all have different priorities.