sounds like your dad is frustrated and having never suffered a mental illness is failing to understand that your brain doesn’t work like his   my parents were the same with me but i was seriously depressed and in and out of hospital for mental illnesses for a few years they always would demand that i “help myself” and that i “just pull yourself together”   the love me they just fail to understand it took years for me to forgive them for their part in my problems but ultimately they weren’t doing it out of malice just a lack of understanding   might be worth your physiatrist or doctor explaining to your parents exactly what is happening to you