Wait how does this differ from the appstore?
Search for WhatsApp? First result is an ad for Twitter and WhatsApp is the second result, half hidden (on an iPhone SE). Search for my bank? First result is another bank. Firefox? First result is Chrome. Doctolib (the app for taking covid vaccination appointments in France, and the main doctors appointment service in general)? Another one that's probably more or less a scam. Google Maps? You get an ad for Coyote.
It wouldn't be so bad if the ads didn't look almost exactly like real search results, and if the actual results were not hidden below the bottom of the screen.
The general quality of apps on the Google Play Store might be worse, but this behaviour never happens there. When you look for an app name, you get that app and not one of their competitors that paid more.
Presumably you're speaking from the Apple side of things, because the Play Store is a fragmented wasteland of low-effort/sometimes-malicious shovelware that barely functions.
To me that means that the hoops Google makes one jump through for app publishing are accomplishing next to nothing with regards to app quality.