Hey mate, hope you’re good? My little one has just turned 6 months and I was completely the same in the first few weeks as you described. I felt as soon as I was passed her or picked her up she went from happy to crying in the space of a few seconds. Now though, she’s completely fine. She loves a cuddle from dad!
I put it down to the very strong bond between mum and baby but also I was over thinking it. I think our little one could pick up on me feeling nervous or tense when holding her. I know it might sound silly but as soon as I learnt to properly relax and take a deep breath when she was having a major cry she settled a lot quicker.
Definitely for me it took me a while to fully understand ‘sometimes babies just cry’, I was always convinced something was wrong but sometimes there just isn’t.
For me it was all about trying to remain positive, focusing on being calm and reassuring for the baby when she was crying and remembering it will always pass.
Hope some of that might help?