There's no "and" that hasn't been said in previous posts. You either prefer The Mandarin as a remarkable man with moderately powerful rings or you prefer him as a set of cosmic rings with a chump attached.
I don't really think there's a choice. The rings ARE ridiculously powerful.
Sure, he's remarkable, but there's thirteen to a dozen of those in the Marvel Universe.
And as for the chump part... he was at the top of his game during 'Haunted', but he still got beaten in a surprisingly simple way.