I was diagnosed with ADHD and started on medication at 12, but not really told anything about what it meant for me or how to deal with it, and when I was 18 -literally when my parents dropped me off at college- was told I was autistic
Edit: don't forget to upvote posts here so they're more visible and people can find the community!
it doesn't absolve the field, but it's not exactly psychiatry's fault that it doesn't know how to teach us anything about our brains