Demon in the Bottle was the beginning, it's the 35 years since then, that writers have tried to exaggerate how bad his drinking days were or exaggerate (only because he is fictional) how spiritual his recovery is. There was a point recently where the US Government put a high tech wheel clamp on the Iron Man armour that would turn on whenever they suspected that Stark was drinking, which they quickly started abusing, and activating "whenever". Stark also had a serious relapse in Fear Itself because he had to live with Dwarfs for a few weeks in their forge, building Uru Armour, who didn't understand the concept of alcoholism.
Jim Rhodes took over for 12 issues our time, because Stark became a homeless vagrant getting drunk every night with all the other bums. There was a surreal issue of Daredevil, completely unrelated, where Drunk Stark crashed a dinner party Foggy Nelson was having, stole all his liquor, started a fight, and left.
Just a reminder that Michael Douglas is Hank Pym in the Cinematic Universe.
Out of universe, there was a misunderstanding between the author and the artist about that altercation between the Pyms. That whack was never supposed to be spousal abuse, it was supposed to be like his arms were flailing (like a monologuing super villain) and Jan accidentally she got in the way... In universe however, this misunderstanding took on a life of it's own.
