Pettiness
Sarriel's gaze flickered with rage, her fists clenching. How many years had she wasted in that wasteland? Her cultivation would have progressed so much faster almost anywhere else. If not for her insistence, she may very well have been in the Dao Pedestal Realm already despite her young age.
To make matters worse, because of the weaknesses of the Moon World, it couldn't produce any outstanding treasures that could have helped her cultivation advance by leaps and bounds. So, she had to stay in this cultivation wasteland without anything to supplement her, more than halving what could have been her true cultivation speed, all for it to mean nothing in the end.