Tons. Even legendary critics like Ebert got movies wrong. He gave thumbs down to Full Metal Jacket, Blue Velvet, The Thing, Fast Times at Ridgemont High, The Usual Suspects, Ace Ventura, Tommy Boy, and many more.
Like the opposite of Leslie Nielsen: a man now really only recognised for comedy, when he got his start in comedy by satirising his own serious roles in mainstream potboilers.
I only wish for the same for Adam Sandler, who made one film (Punch Drunk Love) that so completely changed who he could be that it might one day, maybe, perhaps, just possibly, correct the damage he did to western culture with Little Nicky. ;-)
It's ironic that Ebert misunderstood a film like Fast Times, considering he co-wrote a film with bloomin' Russ Meyer isn't it!
I will have to look up those reviews (as a Brit I was not routinely exposed to Ebert; for us it was Barry Norman).
I don't expect film critics to like every movie, and I do expect them to engage in criticism of films they like, for example of weak parts of dialogue, of spoiled shots, etc.
Unpopular opinion: Blue Velvet is a bad film.