Don't show crab mentality by trying to stop your friend from succeeding.
crab mentality
idiomA phenomenon in which a person or a group of people attempt to hinder the progress or success of others, even if such success does not directly affect their own well-being.
Origin
disputed originFrom the metaphor in which a pot of crabs, one crab attempts to escape over the side, but is relentlessly pulled down by the others in the pot.
The team failed to reach their goal because of the crab mentality among members who sabotaged each other's work.
Instead of celebrating her promotion, her colleagues displayed a clear crab mentality, actively undermining her efforts to improve the department's performance.