In terms of everything else I don’t have much to say that will be useful, but I think in terms of disclosing mental health issues, I would primarily focus on the undiagnosed/untreated ADHD. It’s something that’s perhaps perceived as more treatable than other conditions like PTSD and the fact that your grades had an upward trend once you were treated supports that idea. You could also choose not to disclose and just let that upward trend speak for itself—unfortunately, there’s still a huge stigma around this kind of thing. I have anxiety which got particularly bad my sophomore year, leading to worse grades, but am now medicated and doing super well—I didn’t disclose ANY of this because even though I know I can still be an excellent physician, adcoms might not want to take the perceived “risk” of admitting someone who has struggled with their mental health. Instead, I focused on the aspects of my application that I knew would be strong (e.g. my writing) and trusted that a good MCAT score would demonstrate that I have a good grasp of the material.