What is the most unhelpful advice you have received?
I'll go first: "You have to have children when you're young," told to me when I was in my late 20s, with no desire to ever have kids, and no means to support them, by someone divorced multiple times with at least one adult child who does not speak to them.
Also: Responding to "How do I deal with this problem?" questions with "Oh, don't worry about it, it's enough that you're even thinking about it!"
That since I was pregnant it was time to let my career go.
My career is critical to my family’s ability to live a middle class life (and it’s critical to my sanity and happiness, but the person who gave me this “advice“ wasn’t really one for acknowledging or valuing mental health).