You want to talk about struggling?” I said before he could open his mouth. “Do you know how hard it is to homeschool a fourth grader? Half the time she hates it, and so do I. Do you know that I’ve been trying to get pregnant for literal years and I don’t know if I can? Do you know that I’m in therapy about it? That I have a fertility doctor? We all have our own struggles, Ted.”
Ted struggles to realize everyone is always worried about something and has their own issues. I think this is a key point in the story, showing a major disconnect between Ted and his sister. Ted lacks self-awareness and needs to realize that things he says can be very hurtful, especially towards family.