Current-era CGI is insanely good. The problem is that it's used and abused everywhere, often with very little consideration for whether it's needed, or if there's time to do all the VFX shots etc.
It's like Golum (lotr) vs Jar Jar Binks.
One was a real actor, interacting with other actors, and they just gave him a digital costume. The other was a tennis ball.
I mean for fuck’s sake, they’d probably CG the paint buckets in Home Alone if they made it today. And we’d get some tasteless can-cam shot, because you don’t have to figure it out, you can just do it. And they’d look fake because they’d move too perfectly, lacking the kinds of little off-seeming movements that a real paint can in a real take might do. Never might the can obscure a few frames of face when the directors might choose otherwise, and the result will be obviously CG through its convenience if not due to outright flaws.
Excessive perfection and too many things moving the optimal way for the shot or exactly the way the viewer expects are under-appreciated tells of CG, and they’re deadly ones, present even in a lot of “perfect” CG (give it a few years, we thought the CG in Lord of the Rings was convincing and now it looks like trash). They need to start CGing their fake environments sometimes doing something slightly less than ideal to an actor’s jacket, or something, and not to call attention to it as a comedy relief moment, but because “that’s just what happened” (not really, but it’d make the effects more convincing)
It's also over-reliance on this convenience. Bad shot? We'll fix it in post. Objects missing, or in wrong places, or too many of them? We'll fix it in post. Bad sound, camera position, actor unavailable? Believe it or not, post.
And many don't even think whether you should prepare the shot for post-production, or even give vfx teams more time to complete the work