WHY DOES EVERYONE LOVE SONGBIRD?!

I do not get it. She keeps lying to us the entire time, she planned all the Phantom Liberty shit in order to exit the NUSA, I believed her through all of the plot and in the end she fuck me from behind telling me "oh sorry, on the Moon only one of us can get the cure", she fucked up Reed in the cinematic trailer.. I mean, I just want her to fucking die she's an ego boosted asshole. (I know V killed plenty of people to save himself but he/her seems to have an ethic on his work, Songbird kills and fucks everyone only to get to her purpose)

PS. Sorry if my english is not correct :D