Not talking about anyone in particular, really. Just imagining what my reaction would be if I really, really liked Takeru. I would not be inclined to think warmly of Kaoru, though I would probably give the show a chance to let the plot play out rather than just abandoning the series.
I wouldn't worry about Kaoru treating Takeru poorly. In jidaigeki stuff, treating your subordinates poorly is usually a sign that you're a crappy person. I would be really surprised if Shinkenger didn't want us to find Kaoru basically admirable, since if she's a good person, the situation is much more tragic (and it's much easier to get Takeru back in time for the finale).