He's almost never used to his full potential. Dude showed up on the scene and knocked Sentry into orbit. Later on his took out King Hyperion by himself.
People sleep on blue marvel all the time
He doesn't seem to be written consistent. In the ultimates series prior to 'square'. It's him, America, captain marvel, and his now gf (spectrum I think?) vs Thanos and he was slaughtering them until the gawd came thru and saved the day. Or even when the entire earth force sans mutant went to fight Thanos in Civil war II.
