Am I overreacting or should I say something to dad?

For Christmas this year at my mums house my partner and I bought a bbq and heaps of meat to cook Christmas lunch whilst my mum cooked all the salads and got the drinks. We supplied a slab of beer and cider for ourselves but obvs if anyone wanted any they come have some too. It was supposed to be my usual family 2 sisters and mum, dad and half brother. And my partners 2 kids and parents were coming by to meet my fam for the first time.

My dad is a narcissist and has a habit of ruining every occasion. We’re always waiting on him or he’s always complaining or mad about everything. Last year he didn’t come to Christmas with my family or wish me because I started dating my partner and he didn’t like him so refused to talk to me for 6 months.

This year he texted me in the morning wishing me merry Christmas. I replied and I asked him will he be coming today? He said maybe later he needs to go see my uncle down the road instead ( to smoke and have drinks) he drops my little sister off at my mums at 1pm lunchtime and meets my bfs parents by accident and instead of getting out to wish all of us he says he might come back and leaves. (He didn’t know his parents would be there if he knew he wouldn’t of came so I didn’t tell him) he then calls my sister and says he’s not coming but he’ll come when everyone leaves and get a plate of food. I found this rude but whatever. We didn’t expect him so we didn’t wait for him. Later after everything is over he messaged every single one of us arguing saying that no one invited him to Christmas lunch when we all did. I replied and he wrote some bs back so I didn’t respond ( I know this is typical narc behaviour so won’t be bothering engaging )

This is the part where my partner is extremely pissed off.

Last night my step brother came to the house for my dad and took a bunch of food and a whole trifle and left. Tonight he comes back and takes almost all of the food (mind you we had the entire fridge packed) and

6 of our beers. This meat my partner and I provided and cooked and his parents gifted us all the chops and lamb from a lamb on their farm. The fact that they didn’t bother to come over for Christmas but they come after and take everything including our alcohol enrages us. Is this petty if I now contact them and say something or go and retrieve our alcohol? My dad and brother live on the same st and come and go as they please. They spend their $$ only on cigarettes and alcohol every day and don’t buy food for their house. So they come here and take ours. I find it disgusting and my partner wants to go there and say something he’s that pissed off. What would you do?