The Dum Dum Girls have slipped a bit in recent years, but they are still pretty good. Sleater-Kinney is perhaps the most acclaimed girl band of all time. HAIM's 'Days Are Gone' is perhaps the best girl band release of the 2010s.
There are a lot of good girl bands that have existed in the history of music, and even now. It's just that the good ones are relatively unknown. I hope HAIM can change that though, because their debut was so addictive.