I love the intelligent female gaze aspect of this show and I loved it possibly even more in Killing Eve. PWB so brilliantly undercuts so many stock clichés of female characters and makes them real and nuanced but far from flawless.
One of the things I actually really loved about Sandra Oh in Killing Eve is how PWB did not pull the metaphorical punch in Eve's fight with Nico - she doesn't do the stock single slap to the face and then immediate angst "oh, no, what have I become?" - she steps into his space, slaps him, then pushes him - twice - for good measure. She doesn't shy away from showing what her characters are capable of - in every way. Which is why I don't think FB does have an "excuse" for fucking Boo's boyfriend.
The fact is that people, real people who aren't conspicuously "bad", do worse things than that every day. Fleabag is a messed-up woman and she's caused real people real pain. There's no chocolate box ending here.