@fanatical4christ Hey there, it's clear you're trying your best and that is all you can really do for your baby. You're aware and sensitive so your baby will be just fine. You're doing a great job.
I had a very similar early journey as you. Emergency C-section, wanted to breastfeed so bad, but my baby kept choking so we had to modify the way we fed (side-lying by bottle). I started exclusively pumping. It was the most stressful, tiring period of my life. I would say if you can do it (I couldn't), try bottle feeding her in a similar position as breastfeeding, with her face facing yours so she can look at you.
But I remember having the same thoughts as you about leaving her to cry while warming her bottle. It sucks in the moment , but they will be ok. It's worth mentioning that I had PPA (still have some if I'm being honest). I wish I had joined a mother's group or went to therapy to talk about the trauma and help normalize my experience.
My girl was also same as your baby, happy with everyone she met, smiling and laughing with others, but not so much with me! She was just very social even from an early age. Then stranger danger kicked in around 7 months. Lasted for 3 months or so and then she went back to being super social.
Around a year old her separation anxiety kicked in and she started constantly coming up to me and asking to be picked up. She's 16 months old and still seeks me out a lot. It's very sweet and reassuring. She's such a happy girl now though, and still very social. Has such a great bond with her grandparents and is very open to strangers. But she is still a Mama's girl if she is tired or upset.
Reading about attachment, you only have to get it completely right 30% of the time to develop a secure attachment. And even if YOU do ever right, some experiences with other people might make them a different attachment style. BUT if they end up with an insecure attachment, it's really not the end of the world. Life is difficult, there are going to be challenges for your little person. All we can do is be there for them and strive to be the best parents we can be.