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!”
You dont have to keep going if you are tired and demoralized either. You dont owe pain and suffering and missed opportunities to your past self. You can quit any time you want for any reason or no reason at all, just be prepared to accept the consequences.