My mum had worked hard to get a uni degree and strived (or strove!!) at work so by the time I was born had a 'top professional' job iyswim.
As I say she had a professional job, had published academic papers etc. - she was sometimes interviewed regarding her job on local radio and TV. She returned to work shortly after I was born so I never remember her being a stay at home mum at all.
Anyway, when I was 12 - I came home from school one day - for context - it was July so school was about to break up anyway - and my mum was already drunk - and all that evening she spent time listening again and again to a recording of this radio programme she was on. She didn't make eye contact with me at all - but all evening said things like this about herself - "who would have thought that I, a girl in pigtails, from a remote village, would one day be interviewed on the radio" etc etc. She said this while clearly being drunk and talking 'at' me, as if not addressing me properly. I doubt whether she even made me tea that night.
Anyway, that evening - July so light until late - I ended up wandering the streets - my mum wasn't engaging with me, I also had a borderline eating disorder so used to binge on confectionery and other calorific food - I was fat for a 12 year old.
Just for context - I was an only child - so no other children around for a second opinion - and my dad would have been away with work at the time. My dad was of same job level as my mum - uni educated and subsequent high achiever at work - both would have the kind of jobs where they'd go abroad for conferences etc - you get the picture.
Although I spent a lot of the evening 'walking the streets' in a manner of speaking! - it was an affluent, safe area so I wasn't in any danger - just stuffing my face with sweets as a result of low self esteem - but the point is - I think my mums behaviour that evening was very neglectful. 12 year olds need loads of emotional support imo as it's an age of great transition - you're moving away - even if just emotionally/psychologically - a lot of the time from your 'childhood' influences and beginning preparations both physically and emotionally for adulthood. Imo 12yos need their parents very much - but all I had that evening was a drunk mother talking at me - didn't appear to give a shit about me!
So
YANBU - your mother shouldn't have behaved like that - it's selfish/neglectful/abusive
YABU - your mum was just celebrating her 'success' as she was perfectly entitled to do