''girl support girls'' / sexism

As a gamer girl myself, i've noticed how females get constantly harassed in video games, whether they're winning or whether they can't play the game. Most of this toxicity occurs from the male gender but i would like to bring up its not always the guys !! LOL.  Sometimes ladies its not always ''girl support girls'' and video games is a prime example of that. I've witnessed a mass encounter of females who harass eachother perhaps over a guy or over a simple kill. I dont understand why we cant all get along and stick with eachother to life and support one another.