Aibu to get mildly (3/10 on the scale) angry with family members who wouldn’t leave my crying baby alone...

[FlowTeeBowTee]

Ok so I bump into some family in local park, I’m sitting on bench and baby is in his pram drinking his milk, he is super grumpy with teeth cutting through and always a bit wary of anyone outside the immediate family as he doesn’t see them much.
So uncle says hello to baby and baby starts to cry, that’s fine but he keeps trying to calm baby when he was clearly getting more upset.. aunt then steps in and says hello and baby cries even more.. I’m just getting on with something with my daughter and her school bag but also trying to console baby... I say to the them, he’s just tired and teething, best leave him alone and he’ll be ok. So they stop and talk to me and dd for a moment and baby stops crying and carries on drinking milk. They try again to coerce him into games by saying boo! He starts to cry and they just stand there looking at him.
So I said ahh he’s ok, he just needs a sleep and pull his pram hood down and they continue to try and talk to him! I was a bit perplexed at their tenacity in trying to engage him when clearly it didn’t work and actually caused me stress cos after that he was so so upset all the way home.
Anyway I’m ready to get my coat

How old is the baby if he's drinking milk all by himself? During the separation stage, I find DS responds best if he's held by one of us while he meets new people rather than being left in a pram / on the floor. It just helps him to feel secure. You could try that next time. You can't really expect older relatives to remember exactly how babies respond best, you need to look after your baby and give them suggestions in how to engage with him (e.g. Wait 10 minutes into he's finished his bottle and he'll be more cheerful / he needs hours to calm down around people right now as he's in the midst of separation anxiety).

Baby is almost 1, I couldn’t get him out at that point as I was trying to do something with my DD but I was obviously trying my best to comfort him too

I'd probably just pick him up TBH, it's a lot easier; even if you then carry on talking to your DD he gets to feel secure enough to have a good stare.