it backfires on females, and most times doesn't work for male speakers either.
There's a reason for that. It is the norm of the male-centric society such as ours to write off assertive women as bitchy or crazy. It's not just the men who say this. Women who say it too are complicit in the disgusting, sexist status quo.
A woman raising her voice may sometimes be necessary, because otherwise no one listens. If it had been Bernie screaming, no one would have batted an eye, because dudes gotta be macho. Gimme a break.