low ; decline ; diminish ; be reduced (to) ; take a fall ; go down ; fall off ; suffer a decline ; be depressed ; be in recession ; be down on one's luck ; be in low circumstances ; become impoverished
stagnant (remaining unchanged or making no progress) ; stuck (unable to progress or improve) ; ingrained (deeply entrenched and resistant to change) ; plodding (persistently working or enduring without progress; context-dependent)