Don't blame the fighters, blame the system. It’s not like the NFL, NBA, ect... where your champ one year then the next year everyone is 0-0.
He got beat, beat his next mach-up convincingly, now he’s back in contention. Boxing or any single-man match-up is the same way (wrestling (real) ADCC, ect.
I don't like the system but it's what is in place until it is changed.
Also remember its 1-1; though Mir got his ass handed to him last match-up, it's time to settle the score for both.
If Cock hands him his ass again we won't hear of Mir contending for the title for a long time, as long as Cock is in the game.