Comparative:
* "The new design was uglier than the old one, in my opinion."
* "The weather was uglier today than yesterday, with dark clouds and pouring rain."
* "The argument became uglier as both sides started making personal attacks."
Superlative:
* "That was the ugliest sweater I've ever seen!"
* "Of all the options, this one is by far the ugliest."
* "The situation became ugliest when they refused to compromise."
Figurative:
* "The truth was uglier than any lie they could tell."
* "The reality of the situation was uglier than they had imagined."
Remember, "uglier" is a subjective term. What one person finds ugly, another may not.