no... NO... NNNNNOOOOOOO....
they got like EVERYONE wrong. Deadpool is not a combination of mutations, he's the merc with a mouth who got an extreme healing factor to deal with a cancer that'd kill him, but it also messed with his neurology to the point where he was basically insane. Sabertooth and Wolverine don't really have a filial connection between them, just a former working relationship that went bad because Sabertooth became feral.
I was more referring to Wolverines backstory, but even that has some inconsistencies like the Weapon X program being in the US when, iirc, it was Canadian. I did like that they faithfully showed how he was created and some of the things that motivated him, like the "death" of his woman. I didnt know Sabertooth wasnt his brother, I thought that part was accurate.