I second what pudding and many others have said... if you are altering your behaviour in the hope of not aggravating him, if you have to ‘pick your moment’ to raise a subject...then you are already being ruled by fear.
This may sound extreme, but that phrase ‘walking on eggshells’ is a euphemism for that: living on the edge, worrying what he’s going to pick on next.
Your baby is only 8 weeks old. He should be worshipping you! And doing everything he can to ease your path.
His priority at the moment should be supporting YOU, not picking holes in what you’re doing and castigating you for going for coffee with other new mums or mates. He should be thinking how brilliantly you’re doing, even though you’re feeling knackered and unlovely.
Privately, tell your Health Visitor what he’s doing. You are very vulnerable post-birth, you need lots of support. Unfortunately Health Visitors see this quite often. I think your H had controlling tendencies before the birth, and now he is ratcheting up to being abusive. He is critical of you and manipulating you and, frankly, scaring you with his anger...this is not right.
I know it is hard to hear, but this IS what’s happening to you. If you are too afraid to bring up the subject of anger management with him, then you must conclude that he is bullying you.
I’m really sorry you are going through this OP, I recognise it because it is what happened to me. I come from a family of non-confronters and my XH was quick to temper and quick to cool down again, or so I thought. At first I thought this was healthier than bottling things up. Until I realised how bad it had got, how scared I was and how miserable I was. And it escalated rapidly even days after the birth of our first dc.The worst bit was that no matter how much I tried to communicate with him - gently, tactfully, diplomatically etc. - pleading, he just didn’t care and in fact got angrier and more terrifying. Needless to say he didn’t behave like this with anyone else...somehow I had become the incompetent, selfish, lazy one who needed telling. It was heartbreaking, and just kind of kills your soul and kills everything you hoped for in terms of a happy family life.
I’m not sure you can do much to change him...you’ve already tried telling him how much his behaviour upsets you. The best thing you can do is to keep seeing your friends, ALLOW your mum to support you...she must be worried for you, maybe you and the baby could go and stay with your parents for a bit. Don’t let him isolate you from your family and friends...even though his criticism is aimed at questioning your loyalty and cutting you off from support.
Sorry to be depressing. It is hard to believe that someone who you love is doing this to you. You are not a failure. It is him that is failing you at this time. It is not your job to make things right for him, don’t let him convince you that it is.