The Thing is all wrong!
He looks great. They really captured the look of the Thing. BUT...
The voice, accent and personality are all wrong. They took the New York out of him -accent, attitude and background. Ben Grimm is a product of the lower East side of NY. To us in the know that means something. The producers should have watched a few movies of the Bowery Boys to get the idea. See, e.g., https://www.youtube.com/watch?v=P6IwcnZlh2Y
His accent and attitude are completely wrong, as is the quality of his voice. The Thing is not high-pitched and nasal.
The Roger Corman movie Thing was actually a lot closer to capturing the character correctly. So were those otherwise cringey movies from the 2000s.
This Thing looks so good; what a wasted opportunity.