Am I a bad son because I don't want my moms things?
Is there any problems between you and your mom?
No, I just don't like her things and I don't want to take them!
It is understandable that you do not like your mom's things and do not want them. But you should still accept them or she will feel rejected. Maybe you can give them away later on.
I just don't fucking want them.
Maybe you can find a better home for them. If they are something you really don't like you can just tell your mom that but to just refuse seems like a hurtful way to treat your mom who is just trying to help you out.