I was a BALPA member at previous outfit. Never again.
When I needed help personally they were pretty useless.
For the amount you pay it’s a joke Union. Outside of aviation I have worked at places with unions and without. I would say at places where unions are strong have been slightly better.
BALPA laughing all the way to the bank from BA membership. If BA had amazing T+Cs similar to say Air France then ok it would be worth every penny. They don’t.