Twenty-two-year-old me would have nodded at whatever advice you gave her and then completely ignored it, so I'm not entirely sure how useful the exercise is, but if I had to pick something, it would be around not deferring so much, not treating other people's version of what's reasonable as automatically the correct one. I spent a lot of time in my early twenties just going along with how situations were framed, whether that was work or just ordinary day-to-day stuff, telling myself it was fine, it wasn't a big deal, I'd sort it out later when it felt more pressing. And later always turns up eventually, usually at a point where you've been quietly absorbing something for so long that pushing back feels like starting a fight rather than just saying a thing.
I don't know if I'd have actually done anything differently even with the advice, maybe I'm wrong about that. But I think younger me would have needed to feel it first before she believed it, which is kind of the whole problem with hindsight as a concept. 💙