The type chart is fucked as it stands currently, no two ways about it. Rock, bug, and psychic are almost always a detriment to your type, ice can sometimes be bad. Meanwhile, fairy, ghost, and ground run rampant as the uncontested champs. How do we fix this? Post ideas below, I'll start:
>bug is now SE against ground
>psychic is now SE against fairy and resists fairy
>rock no longer weak to ground