Season 1 passed me by, but seasons 2 and 3 are delightful - funny, unconventional, sharp on gender, strongly characterised, and poised nicely on the verge of complete psychological implausibility without quite tipping over. The thing with Villanelle is that while she's not a sympathetic character, often the show brings the viewer to something like empathy by situating us within her perspective, abetted by the performative - theatrical - way she often telegraphs her responses to situations.