A very large portion of the RT critic pool are film bloggers. Which may explain why Marvel and Disney films get such high marks (or at least higher marks than they would otherwise get, such as in the case of the Aladdin remake). hat said, I'd say about 50% of the pool are actual, paid-for-their work and published-in-a-somewhat-respectable-forum critics. And of those, about 10% are "top critics" from major newspapers and magazines.
That 10% is less than warm towards a lot of genre films. Particularly superhero films, which they tend to regard as a little ridiculous. Their jobs, as they see them, are to advise discerning, educated adult audiences on what works of cinema are worth their time. They view monsters, superheros, dragons, wizards, etc. as something you outgrow as you gain more real life experience. Obviously this is a theorem most of us and a lot of people in general disagree with. Once you understand that bias, though, the Top Critics are a lot more helpful. They are certainly more helpful than the bloggers writing in some sense to be sure they get invited to future screenings and relying on their Patreon payments to support their work.