My take on it, Bertie: Once you've experienced AND ACKNOWLEDGED it, you see it everywhere because it is everywhere. Not too long ago, I advised a (gay, male) friend to be careful of how many concessions he made to his partner. His partner then went on to escalate his controlling and - as so often happens - my friend reacted by becoming rather hysterical in the relationship.
He was reacting to the abuse but, since he wouldn't/couldn't take enough of a step back to evaluate it clinically, felt he was acting unreasonably and kept on trying - you know :( The partner dumped him for his 'moodiness'. My friend is still sad & confused about what happened.
The recognition is really hard; it goes against everything we are told and want to believe about love & partnership. That shared wish to believe in the happy ending is, I think, what drives other people to make us think we're wrong - but feelings don't lie, not often anyway.
There definitely is such a thing as a good love - as you're now finding :) If people were more willing to accept they have the RIGHT to feel happy in their relationship - and the right to end it when it doesn't improve their life - abusers wouldn't find so many victims, and victims wouldn't find it so hard to get heard. I like Mumsnet's 'harridans' for poking away at the truth; I think they (we) do more good than we know!
Plus, the mechanics of abuse is now being taught in schools, hurrah! A stride forward for the coming generation, one hopes 