Negativity is often based on frustration, but frustration itself can be transmuted.
The key is whether mind and breath are functioning properly.
When breath is not balanced, many thoughts and concepts arise, and this leads directly to frustration and negativity.
So it is very important to become conscious of the breath.
Footsteps on the Diamond Path Volume I-III
Breath, Balance and Relaxation Retreat, Ratna Ling, June 3-5, 2022