Sargeras isn't a god. He's a Titan. There is a difference, to be fair.
The Old Gods of Azeroth are more or less weaker than the Titans.
Hopefully that puts things into perspective?
i7-5820K@4GHz | ASUS X99-Deluxe | Crucial 2x8GB DDR4 2133MHz | eVGA GTX 760 SC | Crucial MX100 512GB | Crucial M500 240GB | Crucial m4 128GB | Western Digital Blue 1TB | Western Digital Black 1TB | SeaSonic X660 Gold
ASUS MX239H | Schiit Stack Modi + Asgard 2 | Sennheiser HD598 | Audio Technica ATH-AD700 | Presonus Eris E5 Studio Monitors | Blue Snowball Mic | Steelseries Sensei RAW | Corsair K70 | CyberPower 1500PFCLCD UPS