i mean since hero shooter i guess they couldnt see the future or maybe it WAS by design since sombra countered dps doom a lot. still i wonder who came first… doom or sombra. i think it was sombra not sure.
still its a crazy counter since sombra pretty much nullified all average doom players. not so much now with hack being what it once was but i still disrupt the flow of average dooms if i play her. kinda feel sorry for the dude sometimes… a little bit 
sombra use to really nullify doom but be a soft counter to widow but now she soft counters doom but nullifies widow. still the nullifying widow part is back to almost soft with limited invisibility