Originally posted by carver9
He took on the most powerful team in comics right now and held his own while tanking their attacks. It took Hulk dive bombing him from space to stop him. He dropped Hyperion tanked Thor attacks while defending himself with a powerful blast. Sentry even though he is extremely powerful isn't taking on a team of that caliber...and this happened during the time when he knew 0 about his power. After that he became more fluent with all of his abilities. Sentry will give him a fight but he will lose.
You're aware that when characters are first introduced they have a "good" showing then it mostly tappers off. Since then, what's he done? Nothing. The 'noob' excuse don't work anymore. It's been a year and he's had extensive training on the use of his powers by Nightmask.
Even in his initial appearance the Avengers were holding back because he was a kid. Did you notice toward the end, when they got serious, they had him dead to rights and he gave up. In their later confrontation, he even needed Nightmask's help and they STILL lost (he admits this to Nightmask).