"I just don't like it" sounds as if it may be one of the more petulant Wikipedia essays, but in fact it's the opposite: an admonition to avoid this empty argument and its variants when arguing to remove (or perhaps keep) certain information, or a given encyclopedia entry.
While rarely couched in those exact terms, oftentimes the type of argument is identified by the inclusion of one word in the sentence: "just". This argument is bound to be an emotional one, whereas Wikipedia guidelines favor logic and reasoned debate, with arguments based on evidence.
It's worth keeping in mind that this essay exists for good reason: Wikipedia editors are not immune from making feeble arguments based on feeling, and it's not difficult to find "I just don't like it" arguments being made, especially the contentious "Articles for deletion" forums. Whether you like something or not, you still need reasons.