Okay, I had to look into this. I remember Hank being pissed at Cyclops, but I was reading pretty sparingly at that time. It was during Dark Reign when Hank was imprisoned and tortured by Norman Osbourne. Once freed, he was angry at Scott for not rescuing him and letting him be tortured, when Scott didn't even know he was there. His hurt and anger, coupled with no one taking his side, led him to start trying to prove he was better then Scott, leading him down the road where he brought the O5 to the present, and other things. Didn't Scott explain to Hank what happened?
This is like the 4th time that Hank has been horribly tortured. And he never sought help in dealing with the aftermath. If he still had residual magic in his system from his younger days, maybe the torture jarred loose his soul?
But, that was 2008-20009, quite a long time ago. For this not to have been the 'real' Hank all this time...
Edit: Augh! Triple Post! I'm sorry!