mean-spirited
From Longman Dictionary of Contemporary Englishmean-spiritedˌmean-ˈspirited adjective UNKINDnot generous or sympatheticExamples from the Corpusmean-spirited• Mix this with personality quirks: Gossip, grudges, jealousies, mean-spirited behavior, lack of trust.• No more scoring mean-spirited points to show up the other side.• One stereotype that will never die is the dishonest and mean-spirited politician.• And for very good if slightly mean-spirited reasons.