The bank I was talking about were the worst net loser of customers in the UK last year (around -8000) They are making excuses but maybe they would care about why.
I hate that this is the way it is, I’m a graphene user too, and I see a pretty bleak future for any unsigned OS, followed by a pretty bleak and authoritarian future for humanity.
But for companies that are not monopolies, you can complain to them, and you can give them a bad review on the Play Store. Most companies are not in the business of screwing you: if they screw you, it's just a collateral effect. If you want to be on their radar, you have to make noise.
If enough people complain, then the company sees a need, then they prioritise. If they believe that "it only affects 1 guy who complained 2 years ago", of course they won't do anything... and I don't even know if I would blame them for that.