My love, there is no reason for you to defend anyone, least of all yourself. Not one person here is attacking YOU.
They are horrified at the imbalance in your relationship and at the sadness you are experiencing.
It's OK, it might feel as though you are having to defend yourself, it's a shock to realise that you are in a relationship that is so wrong. NONE of it however is your fault love. Not a jot.
In a normal relationship you WOULD be granted access to your H's car, any of them and all of them.
You would not be called FAT at a sized 12, nor would the amount you drink even if substantial be thrown at you as an insult.
Your parenting would not be undermined, your decisions WOULD hold and your children would understand that Mummy and Daddy act as ONE, and there is no good cop, bad cop dynamic in your home.
WRT the drinking, if you are worried about it yourself, and having a glass of wine while having lunch with your DC IS not usual, and it WOULD impair your judgement/performance.
It's not about being seen or not seen to be drinking, it's about realising that you ARE using it as a crutch and also that it is a potential area where you may need help controlling. Please try to set yourself boundaries for the booze, starting now. No (more) alcohol until the DC are in bed.
Not one of us is judging you, but we see habits being created that could lead you to great difficulty and added complications to a life already problematic.
If you can't stop, please be honest with yourself as soon as possible. Please go to the Dr and tell them the issues you are facing. Please tell them about how your H is controlling you, please get it documented. You may need this 'proof' further down the line. I can't stress this enough. If you just say I am drinking too much, and the Dr treats you for this, if your H decides to kick off and have the DC taken off you, he'd use the alcohol as a way to do it. You need to make sure that his inability to support you emotionally and socially , controlling and curtailing your life needs also to be clearly stated.
Don't ever think that H wouldn't do that to you. If he doesn't try anything, all well and good, but if he does, make sure you have protected yourself.
You may not be ready for all this right now, but just file it away and keep mulling it over, we are here whenever you need support.