To feel disgusted at baby’s uncle?

[Sheerdetermination]

My (drunk) bil burst into the bedroom last night, switching the light on, in order to shout at my dp (his brother) about some keys he couldn’t find. He needed the keys to go to his bedroom in another part of the apartment building.
We are staying at his dad’s apartment.
My baby (who sleeps with us) was woken up and was then awake for 1.5 hours, and today we’re both exhausted.
DP was tipsy and no help at the time.
This morning, I thought by bil would be embarrassed and apologetic. He was neither. Just have a half-hearted apology. Sleep-deprived, upset and angry, I lost my rag and called him a loser. All feels very horrible. But what uncle behaves like that? And how wrong of them both to be drunk- who would have looked after baby if I became ill or something?
AIBU?

@Ozanj those must be rough times. Hats off to you

They got drunk separately by the way. Weren’t drinking together as some have assumed.

Well actually @Sheerdetermination, I became disabled unexpectedly in my early 30's when Dd was 8, so she was my caree.
Before that I muddled through, the same as most single parents and we generally don't spend time worrying about what ifs.
Honestly, this amount of angnst is doing you no good.

@ISpyCobraKai That must have been very tough on you both.