There's often a gap between critic scores and user scores, but this is hardly unique to video games (film is another great example, and the industry there is very different and in some cases a fair bit older than video games).
That film journalists are nearly as corrupt is hardly any defense of game journalists. Fortunately both are becoming increasingly irrelevant, especially as regards reviews.
I'd say film and video game reviews are a pretty apples and oranges tbh. Or at least, I personally am more willing to use movie reviews (ala rotten tomatoes and the like) to make decisions while I lean on user reviews (ie steam) for games.
There's tons of movies that have high user ratings and low critics ratings. That's far more common than the other way around. I mean just look at a list of Michael Bay or Tyler Perry's movies an example.
Meanwhile I'm struggling to think of games that are highly regarded by users but got poor critics reviews. It's almost always the case that a game is more poorly received by the user base than the critics. Granted, that might be because no one is out there reviews "Sex with Hitler" and the like.
For movies, users and critics have essentially the same experience (movies are only a couple of hours). I think they just often value different things. ie moive critics largely hate tonal inconsistency - where a movie veers from wacky to serious and back. Audiences often don't really mind (again, see Bay and Perry).
For games, I think most users play the games far more before reviews than critics, who are giving more of an initial impression. I also think users are often more likely to give negatives based on details - ie there's a ton of negative user reviews for Civ that say "core of a great game and I'm enjoying but I'm giving it negative because the UI is bad and it was released unfinished". I think that would be a positive review with caveats for a game critic.
Other factors:
For anything 'controversial' user movie reviews are basically worthless, as they are easy to review bomb by people who have never seen the film, outside of Cinemascore (which polls people at theaters). You can see the difference in Snow White, which has 1.5 on imdb (bombed by "anti-woke" types), but a B+ from Cinemascore. (It currently sits at 47% from critics). Steam reviews are a lot more reliable as they are at least from purchasers and have a higher barrier to entry (and tell you if the game is returned).
The concept of 'arthouse' movies has been around for decades. The general audience isn't going to go see Moonlight no matter how highly it's reviewed. 'Arthouse' games, so to speak, are a pretty new concept, and the very existence of them seems to have riled up people initially.
Anyway, this ended up being sort of long-winded and off-topic of UI gossip, so I'll digress here.