its not always like that you know, sometimes it can go really far the other way. personally i feel this series is overall very well balanced.It's too easy for the heroine. "Hey magical creature from another dimension that only I have and doesn't exist in this world, destroy that thing that can ruin my plan."
I know this post is old but, wanted to say, yeah it does get harder for her at times. But even when it doesn't, its not like it's not entertaining for a lot of us who enjoy revenge stories lol so who cares, it's funits not always like that you know, sometimes it can go really far the other way. personally i feel this series is overall very well balanced.