How is it not? Odin is the premier Skyfather of Marvel. He would one shot Adam or any other HH. You could add Hulk, Thor and Surfer and the outcome would be the same.
No. Odin physically beats down Thor effortlessly, Thor has better strength feats than Adam ( due to more history to pull from) and they are equals or even if Adam is Thors superior in fisticuffs it would be by a slight margin, nothing that Odin would concern himself over.
And its hard to physically overpower someone when theyre hitting you with tp strong enough to fight against Galactus and blasts that can put Thanos down.
Adam will impress Odin. He'll like, turn his head with a good punch, or give him a bloody lip. Maybe even knock him down if Odin isn't expecting it. But it'd be one of those good job, but I'm going to stop babying you now speeches and looks. "You' remind me of my son. Let me show you how I punish him when he misbehaves " And then Odin will effortlessly pwn him.
On the bright side, Adam could at that point be next in line to get his own Mjolnir.
Mjolnir.
Stormbreaker.
Thunderstrike.
THE BLACK HAMMER.
To the op: how did you get the impression these two were peers? Granted, most of Odins feats are from back in the day, so most wouldnt actually know what he is capable of. Just curious.