When all the normal coping skills have failed and I am going to explode, I buy a few cheap cheap ugly plates or whatever at a thrift store and smash the shyt out of them. Always helps me . If I dont want to clean up a mess after wards I just put one in a plastic bag and smash away.
Might sound silly , but id rather break some ugly junk than something important or take my anger out on other people.
I hope your feeling better soon !