UFC - most one sided beatdowns in recent memory?

Cain vs Dos Santos 2 & 3 Dos Santos has never been the same after those fights.

 Nate Diaz vs Gomi

Cain v Bigfoot and Cain v Bigfoot II

Jon Jones vs. Shogun

Maia vs Nelson

What Frankie did to the Yair hype train was fucking beautiful to be honest 

Bisping v mayhem 

The many times cyborg barely scrapes in making 145 then fights a flyweight 

Saunders-Davis

Brown-Sell

Diaz-Penn

the recent event in mexico had most of the local fighters finished early

Ben Saunders vs Brandon Wolfe. Savage

Dos Anjos vs. Nate Diaz

Bisping/Mayhem

Cain is the master of the dominating beatdown when he's fighting fit.

nrallen -

Cain is the master of the dominating beatdown when he's fighting fit.

And at sea level 

Jones vs Shogun

Paul fielder just whooped Stevey ray 

Rustam khabilov’s debut. That was some manhandling.

Joe lauzon v Gabe Rudiger

Conor v Holloway was competitive, not a beatdown.  Conor used a lot of grappling in that fight I seem to remember.