A lot of people here don't understand the deal between MegaMind and MetroMan - and why the team's take on Megamind's villain past is right
I've seeing a lot of people here debating about Death Battle's verdict of the category of "skill", and one of the arguments is that Death Battle's claim about MegaMind not being skilled as Gru is invalid because MegaMind had to deal with MetroMan for all of his life. Therefore, MegaMind had to deal with a way more powerful adversary, making the claim that Gru had more success in his villain past weaker.
On the surface, that is right. However, if you watch MegaMind's first movie, you will realize that MegaMind never had the intention of winning against MetroMan. It's very implicit in the movie that MegaMind and MetroMan never were enemies. At first glance they are the classic "hero vs villain" trope, but as the movie goes on, you will realize that MetroMan and MegaMind were pretty much the same. They both had expectations of society of their respective roles. MetroMan was expected to be the hero, while MegaMind was expected to be the villain, and they acted accordingly. Metroman never had the intention of killing or defeating MegaMind in a way that he couldn't back. For them, all of this was a game.
When MetroMan had enough and faked his death, Megamind's reaction is of shock and surprise, not triumphant. After enjoying his victory that he fought his entire life for, he got bored and depressed, and tried to create another MetroMan. When he does that, he creates an evil MetroMan. When MegaMind reveals the truth to Tighten, they fight, and MegaMind loses to a weaker, inexperienced and hot headed version of Metroman. The catch being that Tighthen actually wants MegaMind dead, and so MegaMind immedietaly retreats for his life. This part of the movie reveals to us that Metroman never fought MegaMind seriously. After Megamind recounters MetroMan, the hero directly says "my head wasn't in the game that day" and that he was pretty much done and wanted to move on with his life.
Granted, MegaMind wins against Tighten at the end, but that required a lot of things outside of Death Battle's scope, like prepare time and context within the story. There's also the fact that, as mentioned, Tighten is a weaker, unexperienced and hot headed version of Metroman, reducing his effectiveness against MegaMind.
With all of that in mind, we can conclude that Megamind's "feat" about fighting MetroMan is invalid, since it was never a fight, it was a game, and both Metroman and Megamind knew it. Gru, meanwhile, had to fight for his life and to save people he cares about. Gru has to use skill and has to be much more practical. This is the argument that Death Battle did, and why it was so important for the fight. Granted, they worded it not in the best way, but if you understand both characters, you will see that what they said is true. At the end of the day, Gru is just more experienced in actual fights. That's not say that MegaMind could never win against Gru. He could, but Gru would win it most of the time.