I don't really understand the problem. First, I think it's risky to even begin to evaluate whether the people you interact with are more or less intelligent than you. Intelligence is context-dependent. Most of the people you think of as less intelligent probably have a context where they're smarter than you.
"Don't compare yourself to others, for it will make you both vain and bitter; there will always be someone worse, and always be someone better."
Second, what does it matter? When people say things to me that I consider dumb (that can happen both from people less intelligent than me and more intelligent than me), it's rare that I actually need to correct them. Get a sense of when it matters and when it doesn't, and if it doesn't then just let it go.
"Don't compare yourself to others, for it will make you both vain and bitter; there will always be someone worse, and always be someone better."
Second, what does it matter? When people say things to me that I consider dumb (that can happen both from people less intelligent than me and more intelligent than me), it's rare that I actually need to correct them. Get a sense of when it matters and when it doesn't, and if it doesn't then just let it go.