He has a mind control beam! And he's made of the stuff that Captain America's shield is.
Here's a respect thread for him.
Highlights include:
One of his earlier bodies beat the Avengers without a robot army.
Can hit as hard as Thor's hammer.
Caused the goddamned Hulk to fall to the ground, cradling his leg.
Once hijacked Tony Stark's body(he was on a techno-drug, the one from Iron Man 3), and with it, took no damage from sentry, who is a strong as superman.
Once became a Cosmic Threat, only being defeated when a thing that interfered with his tech was introduced. He fought Adam Warlock, and enslaved two species, and nearly the Nova Prime.
His robots once took over the planet, taking control of the U.K. in 9 minutes.
He once got so powerful, heroes from several dimensions and at different parts in time could not stop him. He chose to lose, because the timeline was being ripped apart.
So, basically, he took over the world with his robots, nearly took over the galaxy with several bodies, and took over the multiverse.