Granted, I watch more animated shows than live action (though some of those are aimed at adults, sometimes even age restricted), but I see plenty of females, including a team of females (or mixed male/female) do just fine, each with their own story that includes one of friendship with the others. There isn't "we must make them fight" (unless it's either comedy or a soap opera, though Buffy was part soap opera). It happens, but I don't think it happens as much as you think it does.
While I'm at it, I'd like to point out that media featuring female leads and female teams have done quite well before I was even born (1982), so I tend to roll my eyes in annoyance when people act like using female leads are some radical new hip development in our culture. Furthermore, while the reboot of Charmed flopped, there were reasons for it other than it was a female lead. A lot of it is based on (lazy) writing (and marketing) rather than the demographics of the characters (and even replacing a male character with female in a reboot can get a pass IF the writing and character for it is actually good, such as with Starbuck in the BSG remake, which it rarely is).
Sure there are a relatively few who believe that demographics are all in how to measure a show, be they for or against diversity, but they're actually a minority, however vocal they may be online, the one place people can't tell them to shut up to their face.