I think most people are dumb
That's mean. Why do you think most people are dumb?
Because I'm just tired of them being that way
Sorry you're fed up with people, but it's not really fair to call them dumb all the time. They really aren't, you're just too impatient to learn about others and it warps your perceptions of reality like this. You're gonna hate everyone if you keep thinking this way.
I just don't care.
You should care because how you treat others is taken into account with how they'll treat you in return. If you're rude and treat everyone like they're stupid then they'll never respect you. Isn't it better to just get along with others for the sake of peace?