My new job role is Co-Worker Wrangler
Schools, counseling, and RL is where bad behaviors should be addressed. The subject learns corrected/good behaviors, or he does not.
Work is not a proper venue to address bad behaviors. Managers and co-workers rarely have the skills nor the training to address them, it's rarely a part of their job descriptions, and they are not compensated for it.
Is this person a relative or friend? As someone who worked in Employment Security for 43 1/3 years, it's better to get rid of them sooner rather than have the discontent spread.