Why does Brock not get more criticism?

Do people feel bad for him? Is it because he fights in the UFC?

He has had only 5 wins and 2 losses, so he's pretty green still. Why does a 3 time UFC Heavyweight Champion with 2 title defenses not get critiqued when he has shown in his last 2 fights that he can barely handle getting punched?

I'm not saying he can't take a punch, but running backwards or away and falling into the fetus position is embarrassing and shows that he has been fast tracked before he was even ready. He shows that he barely spars ever in his camp and while a gifted, freakish athlete, his standup still seems amateur.

So how is getting submitted by the world ADCC Heavyweight Champion more embarrassing than getting beaten up badly in 2 of your last fights?