Why don't we use the MC score ? Rotten Tomato gives the pass to any reviews over 60/100.
I used the RT score because it was easier to compare to other superhero movies, since they have specific pages for every franchise. It has a 79 on MC, better than any other DCEU movie. I found this list with all the Marvel movies. Shazam has a better rating than any MCU movie other than the og Iron Man (tied with 79) and Black Panther (88).