About a month or so back, Bayley was about to beat Becky for the title, she was going up top to hit her elbow and then Lyra jumps in the ring and starts pounding on Becky causing a DQ. Yes, Becky provoked her and got under her skin. But she never should have came out to start with. Bayley could've and should've won the IC title that night, but Lyra fucked it all up.
That's what makes great heel turns, when the person is justified in their actions. Like how Liv had every single right to want revenge on Rhea. Yet Liv was the heel.