The word-for word translation would rather be Qu’est-ce qu’il y a à ne pas aimer ?: it would possibly be understood but is not idiomatic.

Some equivalent rhetorical questions that express the idea that there is not much to dislike would be:

Que trouver à redire ?

Pourquoi bouder son plaisir ?

Que demander de plus ?

Que demande le peuple ?