This is related to Mount Qingyu having occupied the highest number of peaks in the early stages, and during the early stages of the Dragon Spring Meet, having a greater number of occupied peaks isn't necessarily a good thing. As a result, Mount Qingyu had to spread out its forces to govern these peaks.
Now, having lost ten peaks in succession, the defensive force of Mount Qingyu has become more concentrated, which made it very difficult for the Tailuo Sect to make any progress.
Moreover, not many people from Mount Qingyu actually died, as the cultivators originally governing those peaks chose not to engage in a tough fight upon detecting the strength of the enemy, preserving a significant portion of their power.
The current disadvantage is only temporary and cannot determine the final outcome.