Marvel movies have little to no artistic value. They are passable popcorn entertainment designed to print money. MCU fans always had the box office to defend their slop which made them very giddy. Now it has come back to bite them in the ass.
Captain Marvel's RT score is from before they added verified ratings. It has twice as many user reviews as Endgame does because it was heavily brigaded and the reason why there's verified ratings in the first place.