The thing is there are justifications for why this could be okay – Nolan did some damage, she wasn’t that beat up, she would have turned the tables moments later even if Mark hadn’t hesitated – but the thing is, it wasn’t framed that way.
Any casual observer who hasn’t read the comics will see that fight and be like “he has her on the ropes!” and think that he was legit about to win before he hesitated. I think they need to make it a little more explicit if they were going for a pyrrhic loss with a single victorious moment.
All I can think of is that maybe Thula started to slow down and toy with Mark once she thought she was winning by a lot and got taken off-guard when the gap closed.