The key to doing a comics film right is to read and respect the source material. This has never happened in four* attempts at a Fantastic Four movie.
Jack Kirby had worked on DC's action quartet Challengers of the Unknown. In 1961, at the nascent Marvel Comics, Stan Lee and Jack Kirby rewrote their buddy bickering as a family of friends at odds with each other as much as their new powers. The book ignited Marvel's success, and Lee's reflective dialogue and Kirby's powerhouse concepts made that momentum exponential. They were idea machines with a conscience, mutating single issues into serial arcs on into a mythos and then a multiverse. As cosmic or complex as FF got, at its core it always had heart and smarts, and it was fantastic in the sense of being inspired and positive.
In general, this looks like a Fantastic Four movie but doesn't cook. The ingredients—the personalities, the powers, the squabbles, the villain—are in the mix but they never gumbo. The effort to make it work shows the strain and breaks the heart. (Chris Evans shines well as the Human Torch, paving his fine work later as Captain America.) Meanwhile, Pixar had just done it perfectly well with The Incredibles (2004), a clear homage to the '60s-era FF. Go see that, and read reprints of the 100 issues by Lee and Kirby instead. They're fantastic!
*Counting Roger Corman's best-ignored attempt in 1994.