Here are some ratings for recent films I've seen:

Operation Finale - B-

Searching - B

Crazy Rich Asians: B

Blackkklansman: A-

The Meg: C

Dog Days: C

McQueen: B+

Christopher Robin: B

Blindspotting: B 

The Spy Who Dumped Me: C 

The First Purge: C

Ant-Man and the Wasp: C

Whitney: B+

Skyscraper: C

Mamma Mia! Here We Go Again: B

The Equalizer 2: C

Hotel Transylvania 3: B-

Unfriended: Dark Web: C+

Mission Impossible: Fallout: B+