FX Networks has announced late-summer return dates for two its comedy series. Season 4 of You’re the Worst is set for 10 PM Wednesday, September 6, on FXX, and Pamela Adlon’s Peabody-winning Better Things bows at 10 PM Thursday, September 14. FXX describes You’re the Worst as a modern look at love and happiness told through the eyes of two people — Narcissistic, brash, and stubborn Jimmy (Chris Geere) and cynical, people-pleasing, and self-destructive Gretchen (Aya Cash)…