I still like Cyclops, he just wasn't prepared for the Phoenix Force. The only thing Cyclops ever did that made me really dislike the character was when he abandoned his wife the second Jean came back and they basically kidnapped baby Cable from her. I've been waiting for years for them to explain that as Mr. Sinister's brainwashing taking hold (since he meddled with Scott's mind as a child and maneuvered them together for breeding purposes), but so far it's just quietly ignored by most creators.
That was explained as being due to Sinister's brainwashing. I don't have the scans on me, but they say it immediately after the battle where he defeats Sinister. One of the other X-Men gives a line along the lines of "I knew you'd never do something like that if not for brainwashing!" Maddie has subsequently stated numerous times that she never loved him, their entire relationship was a combination of programming and Maddie manipulating him with her psychic abilities without his knowledge. That's all a retcon, but it's the explanation they gave.
From that perspective, his actions make perfect sense. You wake up essentially a rape victim forced into a relationship you never wanted.
Oh man. When was this? After Inferno? I would be immensely grateful if you ever come across a scan or remember which issue that was in.