We have 3 month old DS and I think I am less tolerant to DH behaviour since his birth.
Could it be that he has stepped up his controlling behaviour since the birth of your son? This is a very common pattern as the abuser sees you as more vulnerable (well you are, just after giving birth and in those first few months - no two ways about it).
I would guess that you are not 'less tolerant' - you are probably merely trying to resist his ludicrous controlling demands in just the same way as before, but I think it is likely that he has recently got worse.
I have full sympathy OP. I had this with XH. The real kicker is that since you have had the baby, he considers that the power in the relationship has and should go his way. He is using your vulnerability and supposed 'dependence' on him as great new levers to make you do what he wants - all the time.
Your post is incredibly telling. That idea that you went to a shopping centre that 'he doesn't like'. It's amazing - he doesn't like it, there is no suggestion that you have a perfect right to go anywhere you like and to like things that he doesn't like. I got that - I was criticised for liking something and he would keep having a go at my liking for someone or something as if it was a crime. It is very confusing and undermining. And it is often easier to concede or smooth things over, just to get him off your back.
The good thing in your post, from my point of view, is that you are very aware of when he does this to you. Yes, he is controlling. And it you know in your bones it is absolutely wrong and unacceptable behaviour. Unfortunately it does not show him in a good light at all. And even more unfortunately I don't think he is going to change what he is doing. He is a bully. I asked myself time and again 'Who would start a campaign of criticism and nastiness against the mother of his child, the person he is supposed to hold dear, protect and admire??'. I never got to answer that question, apart from the obvious one 'Yes, my husband is that person'. And the only solution was divorce - only sussed that after another child and a few more years living in fear.
Good luck OP. You sound mentally very together. Don't let him drive a wedge between you and your support network. These are the people that will keep you sane. You are right to be concerned about the future. I bet your H believes deep down that men deserve to order women around and that he is essentially a woman-hater. This guy is bad for your wellbeing, truly, and won't be a good relationship role model for your son.
Good luck OP. Please tell your mum/sis/friends about what he is like. Do NOT be ashamed of telling people. And watch out for him going back on ANY agreements about his behaviour. I've had 'negative, anxious and critical' - funny that it was all directed at me, not his friends, colleagues, people he played sport with. Have a think about why he makes YOU the problem.
You sound great OP. Congratulations on your DS and keep your head high.