Mine is the same, if she doesn't calm within a few minutes I suddenly have two humans in meltdown mode😂
It's really hard I think for a lot of them because they are not usually the 'default' parent or the one spending more time with the baby and getting used to all the wee things that settle them etc. or just learning to stay (or pretend) calm through the crying. I wonder if buying him some of those loop noise reducing ear plugs might help with the sensory part of it? My husband usually wears earplugs if our wee one is screaming because he finds it easier not to get stressed if it's less of a sensory overload. I think finding a calming phrase that you can softly say on repeat to baby can be helpful. Mine is always 'Mummy's here baby, I'm right here with you' for some reason that stuck from when I had my daughter. It just gives you something to say as I think they respond well to gentle soothing words but sometimes you can't think of what to say. Maybe he could get a 'catchphrase'! Xxx
My husband does this especially if we're out because he worries we might look like bad parents. I think it's a lot to do with him being at work & having been out and about less with the baby so not yet as used to amazing those situations. Have you tried teaching your partner to learn the difference in your babies cries it might help? I always tell mine what cry (if I'm looking after and he's there so he recognises them now)
I could have written this word for word myself😅 my partner gets extremely stressed out and ends up passing baby to me but then he beats himself up about it later thinking he’s a rubbish dad for not being able to keep his cool😕