Does saying "I hate making up prayers" or "I don't like it because of the hardship it entails for us," while still making them up, fall under the category of hating what Allah has revealed?

Hating worship as an act of scorn is disbelief (kufr). As for hating it in the sense of finding it burdensome, that is blameworthy but not disbelief. So, whoever hates a law of the Messenger (peace be upon him), or hates a ritual among the rituals of Islam, or hates an act of obedience by which people worship in the religion of Islam, is a disbeliever, based on the Almighty's saying: "That is because they disliked what Allah revealed, so He rendered their deeds worthless" (Qur’an 47:9). And deeds are not rendered worthless except through disbelief. As for one who finds worship burdensome without hatred, they possess a characteristic of hypocrisy, but they do not become a disbeliever. The apparent dislike of prayer here is in the sense of finding it burdensome, so it is not considered disbelief. However, a person must strive to love worship and perform it with a good spirit and a cheerful heart.