You’re exactly right that your emotions will never be the same. If they were, re-reading wouldn’t be worth it. You’ll pick up more details in character and plot development, foreshadowing, writing technique, and over-arching themes in more nuance than the first time you read. Reading a book once lets you know the whole plot, but re-reading at least two or three times is the only way to actually understand the book.
It wasn’t bad or good. It wasn’t anything. It barely even cared to try.