Is there an intellectual disability in schizophrenia?

I feel again dumb this night. I am tired also in a way so I have my moments of dumbness definitely. I cant do a lot of things then. Its affecting all these years of isolation I guess. Ill continue struggling though. When I was mean and aggressive in the past I was for sure dumb in those moments. that’s how I was… IQ doesn’t measure everything I find too. whatever.