The answer depends on your relationship with the show.
This arc is notable for the introduction of the "Still Force." For years, the mythology of the show revolved around the Speed Force (represented by a glowing yellow energy). Season 7 expanded this cosmology by introducing opposing forces: the Strength Force, the Sage Force, and the Still Force. While the introduction of new physics provided fresh storytelling opportunities, the execution was polarizing. The Still Force, wielded by the character Deon Owens, allowed for the manipulation of time and entropy. This arc saw Barry attempting to stabilize his dying Speed Force, leading to the dramatic resurrection of the Speed Force in the form of a physical entity portrayed by Michelle Harrison. The Flash - Season 7