I think that there is something called objectively good and objectively bad. It's not gatekeeping to acknowledge that.

I enjoy the Eragon series a lot. All 4 books, in fact, not just the first. But i do absolutely see what others are talking about when they critique it.

That critique however doesn't take away my enjoyment of it at all.

I might know that french fries and chicken nuggets aren't delicacies, but i enjoy them thoroughly nonetheless.

I think that many people attach their identities too much to their likes/hobbies, so when someone criticises or even critiques something, they feel personally insulted. It's a silly way of living one's life.

It is completely possible to love a flawed book, and to hate a great one, whilst being fully aware of the flaws and the greatness.