Where does he claim to train fighters? Where has he ONCE claimed or even tried to train fighters? That's not his goal or objective. He could gear it toward fighters but he makes more money otherwise. A lot of the techniques & concepts he teaches make it in the fighter community anyway. Fedor's workout & training, by the way, incorporates a lot.
As for a Special Forces versus any MMA fighter, you seem to forget that MMA has rules. No special forces is going to try to play that game. He is actually going to use his jacket as a trapping tool and then do some shady shit. That is if he is not concealing a blade. Or create a distraction. Or get KOed if he actually decides to face the MMA fighter head on as if it's match, something they are not trained to do.
P.S. Russian Special Ops performance was crap because a) they were malnutritioned, b) they had almost no morale, c) they were abused. Americans would be crying for mommy & daddy before committing suicide if they had to spend even 6 months in what those guys went through and are going through.