Eso apesta! yes, it's OK... however is just a adoption from english a tranliteration. In spanish, well, it depends on the situation but most commonly you will say i know that sucks! = si, odio cuando pasa eso! (kind of i hate when that happen) man, that sucks! = hombre, eso es terrible or hombre, que gacho! OK, i hope it helps!

En España: ¡Vaya mierda! ¡Que putada!

The best translation would be "Esto apesta!" or "Es un garrón" there's no need of using bad words.

un garrón, que mal, no boludo un bajón.... (perdón por la palabra bol... pero en Argentina lo usamos mucho)