My girlfriends into this so I watch more than I probably should, but I can't help getting annoyed at how shit this can be.
Case in point the three part monk episode: First episode was genuinely good, they set up the premise well and it was engaging. The second episode was fine, until the last ten minutes where they completely forgot the own premise they set up (how was the companions consent 'pure' when she was just doing it to save the Doctor's life?) and the third episode was utterly trash.
That's a pattern you can boil down to basically any episode: 'Decent start, meh middle, rushed unsatisfying ending that doesn't really make sense'