“You can criticize something you love!”
Yeah, and you can also get tired of criticizing something you love. You can get completely fed up with it and decide, “You know what? Flaws aside, I love this thing, and I don’t have to waste hours of my life admitting its flaws to strangers on the Internet in order to somehow justify my love of it.” You can get sick of watching others gleefully tear it apart, for no reason other than that it’s popular and they hate that you love it. You can get sick of watching others tearing it apart with good intentions, too.
In the end, it’s just a cartoon, or a book, or a movie. It’s not that serious, and you can enjoy it without hyper-focusing on its flaws. You don’t need to justify your love of something to someone else, least of all a person you don’t even know.