Bad / Weak
devoid - Not possessing a quality or element typically expected.
innocuous - Not harmful or dangerous; safe.
mediocrity - Lack of exceptional talent or ability — being unremarkable in performance or achievement.
expendable - Not essential, able to be used up or sacrificed without significant loss, easily replaced or not necessary for long-term use.
regress - To move backward in development or progress, often in a way that suggests deterioration or decline.
malfunction - A failure to function properly – when a machine or system doesn’t work as intended.
fade - To gradually lose brightness, color, or strength.
malaise - A societal or group-wide sense of dissatisfaction or stagnation, often in politics or economics.
flaccid - Lacking strength, firmness, or resilience.
ruin - The condition of something that has been destroyed, damaged, or reduced to a state of collapse, often beyond repair.
irredeemable - Beyond saving or improving due to severe flaws or faults.
moribund - In a dying or near-death state — no longer active or effective — stagnant or declining.