Oh Auntie. unmumsnetty hugs
Your DS loves you too. He appreciates everything you have done for him and will continue to do for him. You spend the most time with him though so you get 99% of the tantrums and bad behaviour. He will misbehave with your DP just as easily and he will behave well with you. It's just hard to remember on bad days.
There's no delicate way to put this so I'm just going to stomp in in my size 3.5s. Is it possible that you have a bit of post-natal depression going on? I'm only asking because you sound like I do when I'm depressed.
The thing I remember about depression when I am well is this: depression lies to you. It tells you you are an awful mum / wife / person. It tells you it will never get better because how could it get better if you're awful. It tells you not to ask for help, you are just fine
Except those are all lies. And you, m'dear are an awesome mum. After everything that happened during your pregnancy and delivery you have persevered with breastfeeding because breast is best if you can make it happen. And you didn't drink or smoke or do drugs and you ate well and you continue to do everything as well as you can.
What other mothers do or do not do is irrelevant. How their babies behave is irrelevant. Motherhood is not a competition. But if it were, it would be an Ironman or a 100k run, which is what you've prepared for and are engaged in right now. Other mothers may have prepared differently and their results may be different. But their babies are different babies too. Babies are individuals and they like different things just like we all do.
A friend of mine described having her difficult baby girl after a horrendous birth and a difficult pregnancy that came after multiple miscarriages like this: Hand me a baby on any given day and I'll be fine and dandy. Hand me one right after I've given birth to the bloommin thing and I'm a basket case of hormones and tiredness and pain.
It doesn't really sound conducive to being a calm, balanced parent, going through 12 or 24 or 72 hrs in labour and then once you're properly knackered and it's all finally over, you're handed a baby, your baby, and told 'love this and take care of it and oh by the way you can't sleep through the night any time soon. Enjoy!'
Give yourself a break. Talk to a health visitor or a midwife (maybe the one that offered to stay with you out of hours if DP didn't get back in time?) and ask for help. And whatever you do, remember that we will always always always support you and try to cheer you up. Always