I've enjoyed this show more than I expected to, but this episode was an absolute nightmare mishmash of some of the worst impulses on new trek. It talks about mental health like a subreddit would and it makes for terrible television, AND terrible depictions of trauma response. Why the hell isn't the academy using, I don't know, an actual therapist to treat these students? Instead, they bring in Tilly, whose qualifications for this work is that.....she.....has traumatic experiences too? That's nice and all but "hey just work on this play together; see yourselves in the characters" is very weird, to say nothing of how weird the episode was in general.
The best part of it (the Doctor stuff) was given short shrift and probably should've been the A story of the episode. There's so much there to explore with him being so long-lived and they spent like 60 seconds on it. This was a huge miss for me, unfortunately.