definitely try smoking weed if you want more visuals, however this will definitely make the trip stronger overall. for me, the amount of visuals i get coincide with just the strength of the overall trip. try a good dose of LSD, i would be pretty surprised if you cant get any visuals from 3-4 hits of good L.
i have noticed some people (very rarely), have a natural tolerance to phenethylamines. i think i have slight tolerance--it takes about 1/3 more of a phen for me to get where i want to be compared to most people. however with 2C-B in particular, sometimes people need to up to twice the recommended dosage. this is obviously pretty dangerous because of the 2C's dosage curve. if you can ramp up doses safely to get to where you need to be, 2C-B is incredibly visual, one of my all time favorites.
obviously DMT will you give you plenty of visuals as well. honestly it might have something to do with the product, psychedelics are one of those rare things where they will work on pretty much everyone, regardless of background, psychology, etc, given the right dosage.