Bullied? It looked more like he was having fun with his little brother until he got tired of playing!
If you've watched Canelo's fights, he is a counterpuncher first and foremost, and doesn't actually open up very much. He is only semi-aggressive when his opposition turtles up, which is what happened in his fights with Rhodes, Hatton, and N'Dou. None of those guys actually came to fight him, they just stayed behind a guard and Canelo beat on them in spurts like punching bags with nothing coming back at him to worry about. Gomez came to fight, came with a gameplan of pressuring Canelo by staying low, using his jab, activity, and good upper body movement to try and keep Canelo from catching him with counters coming in. Canelo, sensing the threat, kept backing up looking for spots to counter Gomez, but found them hard to come by for the above reasons. That was the real Alvarez in there, fighting how he would normally fight against an actually aggressive opponent coming to put hands on him. And when he hurt Gomez, the deck was stacked in his favor with the ref(who was a random for a high profile fight, wonder why), who took the first opportunity to stop the fight very early by all accounts. Canelo might have been able to get Gomez out of there, but Gomez deserved the chance to at least show one way or another whether he could continue or not. And just to further demonstrate how stacked things were against Gomez, despite his efforts, the judges had Alvarez winning 49-45(x2), and 50-44 prior to the stoppage so Gomez, as he himself said, was going to have to KO Alvarez to win the fight.
I didn't notice any bullying. He just took a while to turn it on. He didn't look very good for the first while, but he was fighting GOMEZ, FFS, and knew that he could end things pretty much any time he felt like it.