@Summermeadowflowers i feel you. Your DS1 and my DS1 are around the same age I think (2yr 2m here) and DS1 loves ‘rough play’. So when he’s overtired he’ll canter around, throwing himself all over the place and all over me and DH, and then inevitably because he’s overtired he’ll slip and hurt himself and then there is deep deep sadness. It’s all a bit much of an evening. Plus DS2 wants to feed at 6pm - prime toddler bedtime.
I also totally get it on the taking the baby’s things like bouncy chair and toys. DS1 sat in the bouncy chair every time he saw it for the first few weeks and screamed if he couldn’t. Lay down in the baby’s crib, wanted to be in the bassinet bit of the pram, wanted to sit in the baby bath… It was exceedingly tedious.
The advice we got about improving sibling relations was to involve the older sibling in looking after the younger sibling. Eg asking him if he wants to come and help to change his brother’s nappy, asking him to hold the new nappy or the wet wipes or whatever until you need them; you may end up with a number of clean nappies being discarded or whatever, but it involves DS1 and gives him a role in looking after the baby, rather than the baby being something that just takes mum’s attention away from him.
A joint bath went quite well this week. We put them in the bath together with DS2 in an angelcare bath, and then showed DS1 how to pour water GENTLY over DS2’s body. He was super pleased to have a role, if a bit too enthusiastic - but that was fine as long as I was there to stop DS2 get a face full of water. It was actually rather lovely. Hit and miss - we tried again yesterday and overtired DS1 wanted to ‘play the baby’ and get into the angelcare when DS2 was already in it - but it’s an idea.
Weve also stressed the brother thing. When DS1 behaves well towards the baby, he’s praised for being such a good big brother, and we refer to ‘your brother needs x / your brother is doing y’. Again, gives DS1 a role and way of feeling involved and important, and framing him and the baby in relation to each other.
The first few weeks were super rough and I felt like I’d ruined DS1’s life. But it has sort of clicked now and DS1 treats DS2 much like the cat - stroking him and wanting him to be happy. I hope it improves for you, it was really difficult and I really feel for you.