He's relapsed, he's back to spirits and hiding the bottles. Not much different from where you started.
It's hard to stop drinking. He gave it a good try because the alternative was you leaving, but the motivation faded over time. Without the inner desire to be sober for his own sake, for his health and mental well-being, he's always going to be white-knuckling. It's so hard to understand why after many tries something just clicks and sobriety becomes essential, but obviously he's not there yet.
You aren't over-reacting. He's fully relapsed. Where does that leave you?