The last 8-12 years the American fighters are all so obsessed with striking, most of the fights are striking only.. and its like they have all forgotten grappling. Its become much more of a striking focused sport.. and UFC cut very good grapplers like Jared Rosholt who had a 8-2 record in UFC.. when UFC need all the HWs they can get this is absurd and not about who can win, but who can entertain. because they deem it boring and no one wants to see it.
The Russian guys have taken advantage of this because their grappling is superb and the American fighters just focus so much on striking now.. and with all the bro science trainers feeding them all that rabbits food and seeds, they are all weak, not physically strong. Whereas those Russian fighters don't have those bro scientists, they eat large meat and potato and hence will have good chins and are strong.
Master American grapplers like Dan Severn who never ever lost to a Russian in MMA or wrestling are long gone, the American fighters can't grapple much at all, just striking and slugging and point fighting.