Oh my goodness OP, I was you! I was exactly where you are and just couldn’t believe I felt that way. He too was a longed for child and I was just in disbelief at how badly I felt I was failing.
I too had very little support and the whole thing was a whirlwind of isolation, loneliness, anxiety and competitiveness. Alongside feelings of bitterness that this was how I felt.
I thought I hated my baby (although, like you, I knew I didn’t, which in itself was so confusing!).
I fell pregnant unplanned when he was just over 1, and I’m almost entirely sure that if that hadn’t happened he’d be an only child.
It wasn’t until I had my second child (unbelievably I now have 4!) that I realised, I absolutely love my children, I just HATE this totally ridiculous, irrational, stupid toddler phase.
Other people love it, but no, not for me!
I was only able to realise this with the passage of time, with creating a life and memories and personalities with my child/children.
I am almost certain that you will get there too, and you may look back at this post in a couple of years and forget the person who wrote it.
By the way, it’s worth reading about the ‘good enough mother’, I think it’s Donald Winnicott.
Depending on your personality or childhood or whatever, you may be holding yourself to a much too high standard of expectation. It’s important to be kind to yourself too.
Best of luck!