I did not know this was a thing, but it explains so much.
I've learned to give up on smaller things if an initial complaint doesn't go anywhere, just because it isn't worth my rage and frustration (which will still happen but I have to redirect), but bigger things (like blatant and illegal discrimination) I will never let go of, even when there is no more fight left (because I can't afford to take a multi-billion pound company to court), at the very least I will never use that company again (no matter how much inconvenience it causes me). Which is absurd, because they don't give a shit, but I know I'm standing by what's right.
I hate this shit so much, but then I get this voice in my head telling me that if I don't fight no on will and another exploitative scummy company will get away with fucking people over. Which I realise isn't all my responsibility, but I just can't help it.