Re: Your husband thinks you aren’t intelligent enough?
Characterizing any mismatch of intelligence (or knowledge) as acquiescence on the part of the OP’s husband to his mother, is awfully presumptuous. The OP mentioned herself that her husband has not explicitly mentioned this as a problem to her, yet you and PCG assume that he’s not happy. In fact, it is the OP who wishes to improve her general knowledge. Instead of blaming her husband, the advice should be directed at helping OP.