People who are in healthy relationships will succeed in natural and practical areas so that you can succeed.
Those who have social emotional issues (narcissism, sociopaths, passives aggression, misogynists, misanthropist, etc.), will fail so that you can fail.
They can’t take you being successful or happy, thus, they’ work against you.
Since they are unhappy with themselves, them sabotaging your happiness makes them feel powerful.
People who are happy with themselves will push you ahead simply because they love you and want you to be happy.