inferior quality; substandard; low-grade

base; mean; despicable

inferior; disadvantaged

clumsy; botched

shoddy; of poor quality

inferior

good and bad; merits and drawbacks

inferior; false

elimination of the weak (cf. 優勝劣汰|优胜劣汰[you1 sheng4 lie4 tai4])

poor-quality; inferior

evil gentry; wicked landlord

bad record (esp. of a public official); unsavory track record

coarse

muddled and inferior (of writing)

base; mean; despicable

stubborn and obstreperous; naughty and mischievous

(idiom) survival of the fittest

see 優勝劣汰|优胜劣汰[you1 sheng4 lie4 tai4]

cheap quality counterfeit (goods); low-quality commodities

notorious for one's misdeeds

local bosses, shady gentry (idiom); dominant local mafia

which of the two is better?

bad money drives out good money (economics)