Depends on which Fantastic Four you are talking about.
I said this in my review, for those wondering about the 30% RT rating. This is as bad as Rise of the Silver Surfer or Green Lantern, it's just bad in a totally different way.
Those films are bad for terrible scripts, lack of vision, sub part acting, miscasting, and a number of other issues.
BvS is bad primarily because of the incompetence of the director and his inability to tell a coherent story.
If you're talking about that abomination of a F4 movie last year, yes this is better but that misses the point.
Snyder is as arrogant as Josh Trank, but he's not a megalomaniac like Trank is, and he's more talented than Trank. But they both share the same blind spot for their weaknesses and refuse to take any input from anyone else.
The simple fact of the matter is that Snyder does not understand these characters and has a blatant hostility toward anyone that would tell him differently. Originally, the "Jenny" character in MoS and BvS was supposed to be Jenny Olson, a gender swapping of Jimmy Olsen. This was later pulled in the late stages of MoS. Just for a FU to the fans, Snyder gives us Jimmy Olsen in this film [blackout] makes him a CIA agent and then promptly shoots him in the head [/blackout].