I will go to the ends of the earth for actor Zoey Deutch (Flower, Buffaloed), but I have to draw a line at Chad Hartigan’s nonsensical romantic-dramedy The Threesome. An indie that positions the ambitious performer as a second, sometimes third, banana portraying a waffling love interest. Deutch plays Olivia, a sarcastic server, who incessantly teases guy pal Connor (Jonah Hauer-King of 2023’s The Little Mermaid). This sharp-tongued playfulness turns Connor on, but Olivia has…