Partner drinks during the day

Is it a problem if your significant other drinks/gets drunk during the workday? He works from home. I’m not talking a beer or even two. When he drinks it’s like a pint or half pint. How severe it impairs him depends on how fast he consumes it and of course if he had any food or other stressors going on. It’s not everyday but at least 1-3 times a weeks his speech is ‘off’ when I get home. It bothers me because I feel like he’s not mentally there or cares about me. We have two small kids at home. We have someone watch them three days a week then he watches them and works two days. He’s proven to me I can’t trust him those two days but let’s be honest he’s their dad and made it clear that ‘I’ll never take his kids away from him’ and he fight me. I’m looking for a babysitter but I have to figure out where I’ll pull the money from to afford it. He recognizes he has a problem and doesn’t want to drink the way he does but clearly isn’t taking any steps to work on himself. I think deep down he doesn’t want to give it up because that’s admitting that he can’t control it and is powerless. At this point I’m emotionally done. I can’t accept the fact that he drinks that amount and attempts to hid and lie about it. Week after week I find empty bottles hidden. I just need advice on how to coparent for someone who’s gone through this because he’ll end up having them a few days a week. I can’t and am not going to keep the kids away from him. He’s not a terrible human he’s just lost, depressed, etc and has absolutely no coping skills. How can I trust that my kids will be okay. I want them to have the best life. We’re both 30 and going through weekly counseling sessions. He’s going away for business in December so I’m thinking of telling him I’ll give him until then to work on our relationship and if he can’t make changes with this behavior then I’ll move out then 👍🏻