Detestable; hateful; annoying in a way that provokes strong dislike (used about people’s behavior or expressions).
彼の得意げな態度が憎たらしい。
His smug attitude is infuriating.
あの憎たらしい笑みを見ると腹が立つ。
Seeing that hateful smirk makes me angry.
詐欺師の態度は本当に憎たらしい。
The con man's attitude is truly revolting.