The wild parties, not paying the rent, and refusing to speak to her landlord, other than rudely, led my friend to conclude she'd started doing drugs. Without shame he evicted her. Too often anger results in landlords making one of the 16 mistakes that loses an eviction. Extra comments on forms and letters will ensure that the judge lets your bad tenant stay. Another anger-induced reaction and sure way to lose an eviction is harassment of the tenant.
Evictions are a fact of business for landlords.
You don't need to feel guilt or shame, and good business sense demands that you keep your anger under control.